April 2025 - dovecot - dovecot.org

2.4 Error: login_trusted_networks: Invalid network '::1'
by James 10 Apr '25

10 Apr '25

Good afternoon, With this line added to the default dovecot.conf: login_trusted_networks = ::1 I get this error: Apr 10 12:41:22 mailhost dovecot: [ID 702911 mail.info] master: Dovecot v2.4.1-4 (7d8c0e5759) starting up for imap, lmtp Apr 10 12:41:37 mailhost dovecot: [ID 702911 mail.error] imap-login: Error: getaddrinfo() failed: non-recoverable name resolution failure Apr 10 12:41:37 mailhost dovecot: [ID 702911 mail.error] imap-login: Error: login_trusted_networks: Invalid network '::1': user=<>, rip=2a02:1234:abcd:1::3, lip=2a02:1234:abcd:a::2, session=<sA2GEWsyNfIqAoAQ0BwAAQAAAAAAAACH> Version 2.4.1 Works with 2.3.21.1 and many versions before. It complains with any IPv6 address in login_trusted_networks.

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crypt_private_key_file retrived from userdb/ldap doesn't work
by luis.neapolis＠gmail.com 10 Apr '25

10 Apr '25

Hello, if I try to retrieve crypt_private_key_file from userdb/ldap doesn't work, infact if I have: crypt_global_private_key main{ crypt_private_key_password=secret crypt_private_key_file=/path/to/file } all is ok. If I want to have: crypt_global_private_key main{ crypt_private_key_password=secret crypt_private_key_file= } userdb ldap { driver = ldap ..... fields { mail_crypt_global_private_key/main/crypt_private_key_file=inline:%{ldap:key} } } I have into logs: lmtp(134879): Fatal: Raw user initialization failed: mail_crypt_plugin: nuovo: Couldn't parse private key : Unknown key format I am sure that the key is correctly base64 encoded, infact if I pick the ldap value of %{ldap:key} and I decode base64 I have the pkey crypted key. Any suggestion?

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Multiple namespaces with individual quota values from LDAP
by Andreas Oster 10 Apr '25

10 Apr '25

Hi all, I have successfully managed to get individual user qota for inboxes with values from LDAP working on Dovecot 2.4. I achieved this with the help of a posting from Aki Tuomi: <-- I'd recommend moving the storage_size out of quota "User Quota", since it's then easier to override: quota "User quota" { driver = count ... } quota_storage_size = 10G Aki --> However, in my setup I am using a separate namespace for mail "archiving" on a slower storage. I would like to also restrict the available storage space for users individually in this namespace. To achieve this I ideally would like to fetch the value from a different LDAP attribute. Can this be achieved with dovecot 2.4 ? In version 2.3 this was not a problem. Thank you very much for your kind help. Best regards Andraes

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SQL userdb homedir
by Scott Q. 08 Apr '25

08 Apr '25

I am trying to use a stored procedure in sql for returning the various fields for the user. I'm concerned about what happens if the stored procedure fails to retrieve the homedir and other fields, for whatever reason. What should it return to notify dovecot of failure ? a single null field, all fields as null, empty result set ? Thank you I am trying to use a stored procedure in sql for returning the various fields for the user. I'm concerned about what happens if the stored procedure fails to retrieve the homedir and other fields, for whatever reason. What should it return to notify dovecot of failure ? a single null field, all fields as null, empty result set ? Thank you

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Per-User quota with LDAP
by Damien Brémont 07 Apr '25

07 Apr '25

Hi all, I'm trying to setup Per-User quota with LDAP on dovecot 2.4.1 When I try to recalc quota for user, data is retrieved from LDAP server # doveadm quota recalc -u user dovecot: auth: Debug: conn unix:/run/auth-userdb (pid=34516,uid=0): Server accepted connection (fd=20) dovecot: auth: Debug: master in: USER#0111#011user#011protocol=doveadm dovecot: auth(user): Debug: : Performing userdb lookup dovecot: auth(user): Debug: ldap: Performing passdb lookup dovecot: auth(user): Debug: ldap: pass search: base=ou=user,dc=madrid-ias,dc=eu scope=subtree filter=(&(objectClass=posixAccount)(uid=user)) fields=uid,homeDirectory,uidNumber,gidNumber,quotaBytes dovecot: auth(user): Debug: ldap: result: uid=user gidNumber=8 homeDirectory=/home/users_LDAP/user uidNumber=10017 *quotaBytes=32000000* dovecot: auth(user): Debug: ldap: Finished passdb lookup dovecot: auth(user): Debug: : Finished userdb lookup dovecot: auth: Debug: userdb out: USER#0111#011user#011home=/home/users_LDAP/user#011uid=10017#011gid=8#011*quota_storage_size=32000000B* dovecot: auth: Debug: conn unix:/run/auth-userdb (pid=34516,uid=0): auth-master client: Disconnected: Connection closed (fd=20) (created 159 msecs ago, handshake 159 msecs ago) Same when an email is delivered: Debug: master userdb out: USER#0113606183937#011user#011home=/home/users_LDAP/user#011uid=10017#011gid=8#011*quota_storage_size=32000000B*#011auth_mech=PLAIN#011auth_token=8a4a9216541654643f33119dd9a280c672c#011local_name=127.0.0.1 But finally the quota limit is still the default value # doveadm quota get -u user Quota name Type Value Limit % User quota STORAGE 6294796 *10485760 60* User quota MESSAGE 29190 - 0 All my dovecot configuration is available below. About Postfix, dovecot-lda is called with -d option: mailbox_command = /usr/lib/dovecot/dovecot-lda -f "$SENDER" -d "$USER" If you have any idea. Thanks in advance for you help. Best Damien BTW, some "%" seem to be missing in the 2.4 documentation https://doc.dovecot.org/main/core/plugins/quota.html before {ldap:quotaBytes}B *Dovecot version:* 2.4.1-4+ubuntu24.04 *dovecot -n:* # OS: Linux 6.8.0-57-generic x86_64 Ubuntu 24.04.2 LTS ext4 # 4 default setting changes since version 2.4.0 dovecot_config_version = 2.4.0 auth_mechanisms = plain login default_client_limit = 12015 default_process_limit = 3003 default_vsz_limit = 256M dovecot_storage_version = 2.3.0 fts_autoindex = yes fts_autoindex_max_recent_msgs = 999 fts_search_add_missing = yes ldap_base = ou=MyOU,dc=domain,dc=com ldap_uris = ldap://localhost log_debug = category=auth mail_driver = maildir mail_home = /home/users_LDAP/%{user}/Maildir mail_path = /home/users_LDAP/%{user}/Maildir mail_plugins { quota = yes } protocols = imap pop3 sieve ssl_min_protocol = TLSv1.3 passdb ldap { fields { user = %{ldap:uid} userdb_gid = %{ldap:gidNumber} userdb_home = %{ldap:homeDirectory} userdb_quota_storage_size = %{ldap:quotaBytes}B userdb_uid = %{ldap:uidNumber} } bind = yes filter = (&(objectClass=posixAccount)(uid=%{user})) } namespace inbox { mail_driver = maildir mail_path = /home/users_LDAP/%{user}/Maildir hidden = no inbox = yes list = yes prefix = separator = / subscriptions = yes type = private mailbox Drafts { special_use = "\\Drafts" } mailbox Junk { special_use = "\\Junk" } mailbox Trash { special_use = "\\Trash" } mailbox Sent { special_use = "\\Sent" } mailbox "Sent Messages" { special_use = "\\Sent" } } service imap-login { inet_listener imap { } inet_listener imaps { port = 993 ssl = yes } } service pop3-login { inet_listener pop3 { } inet_listener pop3s { } } service submission-login { inet_listener submission { } inet_listener submissions { } } service lmtp { unix_listener lmtp { } } service imap { } service pop3 { } service submission { } service auth { unix_listener auth-userdb { mode = 0777 user = mail } unix_listener /var/spool/postfix/private/auth { mode = 0666 } } service auth-worker { } service dict { unix_listener dict { } } ssl_server { cert_file = /etc/letsencrypt/live/cert/fullchain.pem key_file = /etc/letsencrypt/live/cert/privkey.pem } protocol lda { mail_plugins { sieve = yes } } protocol imap { mail_max_userip_connections = 50 mail_plugins { imap_sieve = yes imap_quota = yes } } service managesieve-login { vsz_limit = 64M inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service managesieve { } quota "User quota" { driver = count storage_size = 10G quota_warning warn-95 { quota_storage_percentage = 95 execute quota-warning { args = 95 %{user} } } quota_warning warn-80 { quota_storage_percentage = 80 execute quota-warning { args = 80 %{user} } } } service quota-warning { executable = script /usr/local/bin/quota-warning.sh user = dovecot unix_listener quota-warning { user = mail } } sieve_script personal { active_path = ~/.dovecot.sieve driver = file path = ~/sieve } Hi all, I'm trying to setup Per-User quota with LDAP on dovecot 2.4.1 When I try to recalc quota for user, data is retrieved from LDAP server # doveadm quota recalc -u user dovecot: auth: Debug: conn unix:/run/auth-userdb (pid=34516,uid=0): Server accepted connection (fd=20) dovecot: auth: Debug: master in: USER#0111#011user#011protocol=doveadm dovecot: auth(user): Debug: : Performing userdb lookup dovecot: auth(user): Debug: ldap: Performing passdb lookup dovecot: auth(user): Debug: ldap: pass search: base=ou=user,dc=madrid-ias,dc=eu scope=subtree filter=(&(objectClass=posixAccount)(uid=user)) fields=uid,homeDirectory,uidNumber,gidNumber,quotaBytes dovecot: auth(user): Debug: ldap: result: uid=user gidNumber=8 homeDirectory=/ home/users_LDAP/user uidNumber=10017 quotaBytes=32000000 dovecot: auth(user): Debug: ldap: Finished passdb lookup dovecot: auth(user): Debug: : Finished userdb lookup dovecot: auth: Debug: userdb out: USER#0111#011user#011home=/home/users_LDAP/ user#011uid=10017#011gid=8#011quota_storage_size=32000000B dovecot: auth: Debug: conn unix:/run/auth-userdb (pid=34516,uid=0): auth-master client: Disconnected: Connection closed (fd=20) (created 159 msecs ago, handshake 159 msecs ago) Same when an email is delivered: Debug: master userdb out: USER#0113606183937#011user#011home=/home/users_LDAP/ user#011uid=10017#011gid=8#011quota_storage_size=32000000B#011auth_mech=PLAIN#011auth_token=8a4a9216541654643f33119dd9a280c672c#011local_name=127.0.0.1 But finally the quota limit is still the default value # doveadm quota get -u user Quota name Type Value Limit % User quota STORAGE 6294796 10485760 60 User quota MESSAGE 29190 - 0 All my dovecot configuration is available below. About Postfix, dovecot-lda is called with -d option: mailbox_command = /usr/lib/dovecot/dovecot-lda -f "$SENDER" -d "$USER" If you have any idea. Thanks in advance for you help. Best Damien BTW, some "%" seem to be missing in the 2.4 documentation https:// doc.dovecot.org/main/core/plugins/quota.html before {ldap:quotaBytes}B Dovecot version: 2.4.1-4+ubuntu24.04 dovecot -n: # OS: Linux 6.8.0-57-generic x86_64 Ubuntu 24.04.2 LTS ext4 # 4 default setting changes since version 2.4.0 dovecot_config_version = 2.4.0 auth_mechanisms = plain login default_client_limit = 12015 default_process_limit = 3003 default_vsz_limit = 256M dovecot_storage_version = 2.3.0 fts_autoindex = yes fts_autoindex_max_recent_msgs = 999 fts_search_add_missing = yes ldap_base = ou=MyOU,dc=domain,dc=com ldap_uris = ldap://localhost log_debug = category=auth mail_driver = maildir mail_home = /home/users_LDAP/%{user}/Maildir mail_path = /home/users_LDAP/%{user}/Maildir mail_plugins { quota = yes } protocols = imap pop3 sieve ssl_min_protocol = TLSv1.3 passdb ldap { fields { user = %{ldap:uid} userdb_gid = %{ldap:gidNumber} userdb_home = %{ldap:homeDirectory} userdb_quota_storage_size = %{ldap:quotaBytes}B userdb_uid = %{ldap:uidNumber} } bind = yes filter = (&(objectClass=posixAccount)(uid=%{user})) } namespace inbox { mail_driver = maildir mail_path = /home/users_LDAP/%{user}/Maildir hidden = no inbox = yes list = yes prefix = separator = / subscriptions = yes type = private mailbox Drafts { special_use = "\\Drafts" } mailbox Junk { special_use = "\\Junk" } mailbox Trash { special_use = "\\Trash" } mailbox Sent { special_use = "\\Sent" } mailbox "Sent Messages" { special_use = "\\Sent" } } service imap-login { inet_listener imap { } inet_listener imaps { port = 993 ssl = yes } } service pop3-login { inet_listener pop3 { } inet_listener pop3s { } } service submission-login { inet_listener submission { } inet_listener submissions { } } service lmtp { unix_listener lmtp { } } service imap { } service pop3 { } service submission { } service auth { unix_listener auth-userdb { mode = 0777 user = mail } unix_listener /var/spool/postfix/private/auth { mode = 0666 } } service auth-worker { } service dict { unix_listener dict { } } ssl_server { cert_file = /etc/letsencrypt/live/cert/fullchain.pem key_file = /etc/letsencrypt/live/cert/privkey.pem } protocol lda { mail_plugins { sieve = yes } } protocol imap { mail_max_userip_connections = 50 mail_plugins { imap_sieve = yes imap_quota = yes } } service managesieve-login { vsz_limit = 64M inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } service managesieve { } quota "User quota" { driver = count storage_size = 10G quota_warning warn-95 { quota_storage_percentage = 95 execute quota-warning { args = 95 %{user} } } quota_warning warn-80 { quota_storage_percentage = 80 execute quota-warning { args = 80 %{user} } } } service quota-warning { executable = script /usr/local/bin/quota-warning.sh user = dovecot unix_listener quota-warning { user = mail } } sieve_script personal { active_path = ~/.dovecot.sieve driver = file path = ~/sieve }

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Pigeonhole: (Sub-)Folders containing emojis not found
by Alexander Skwar 07 Apr '25

07 Apr '25

Hello $ dovecot --version 2.3.21.1 (d492236fa0) I've got the following rule defined:require ["regex","imap4flags","fileinto"];if anyof (address :regex :comparator "i;octet" "from" ".*@(bls\\.ch|redditmail\\.com|mail\\.tagesanzeiger\\.ch|link\\.ch|app\\.intervista\\.ch|news\\.outdooractive\\.com|spschweiz\\.ch|mail\\.landbote\\.ch|sofalesungen\\.ch)$") { fileinto "🗣 MLs Foren/🗞 Newsletter"; addflag "$label6"; stop;} There are also others, of course. In the Sieve log file “a(a)skwar.xyz.sieve.xn--log-9o0a, I find that the filter did not work: error: msgid=<a48c8bad-1d8f-4c29-a41d-e58f2dc2eed6(a)ind1s01mta1013.xt.local>: fileinto action: failed to store into mailbox '🗣 MLs Foren/🗞 Newsletter': Mailbox doesn't exist: 🗣 MLs Foren/🗞 Newsletter. I'm attaching the message as well. The folders DO exist — both parent “🗣 MLs Foren” and subfolder “🗞 Newsletter”. Why's that? I'm using Mailcow v2025-03a; Dovecot: 2.3.21.1 (d492236fa0). I created the folders and filters in SOGo webmail, which is shipped with Mailcow. Thanks, Alexander -- Alexander -- Complete contact details at https://a.skwar.xyz/ Hello $ dovecot --version 2.3.21.1 (d492236fa0) I've got the following rule defined: require ["regex","imap4flags","fileinto"]; if anyof (address :regex :comparator "i;octet" "from" ".*@ (bls\\.ch|redditmail\\.com|mail\\.tagesanzeiger\\.ch|link\\.ch|app\\.intervista\\.ch|news\\.outdooractive\\.com|spschweiz\\.ch|mail\\.landbote\\.ch|sofalesungen\\.ch)$") { fileinto "🗣 MLs Foren/🗞 Newsletter"; addflag "$label6"; stop; } There are also others, of course. In the Sieve log file “a(a)skwar.xyz.sieve.xn--log-9o0a, I find that the filter did not work: error: msgid=<a48c8bad-1d8f-4c29-a41d-e58f2dc2eed6(a)ind1s01mta1013.xt.local>: fileinto action: failed to store into mailbox '🗣 MLs Foren/🗞 Newsletter': Mailbox doesn't exist: 🗣 MLs Foren/🗞 Newsletter. I'm attaching the message as well. The folders DO exist — both parent “🗣 MLs Foren” and subfolder “🗞 Newsletter”. Why's that? I'm using Mailcow v2025-03a; Dovecot: 2.3.21.1 (d492236fa0). I created the folders and filters in SOGo webmail, which is shipped with Mailcow. Thanks, Alexander -- Alexander -- Complete contact details at https://a.skwar.xyz/

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dovecot-pigeonhole 2.4.1 example config files are deprecated
by Peter Varkoly 05 Apr '25

05 Apr '25

dovecot-pigeonhole version 2.4.1 The delivered example configuration files 20-managesieve.conf 90-sieve.conf 90-sieve-extprograms.conf have the syntax of 2.3 and dovecot 2.4.1 can not parse these. Following error messages occurs: Fatal: Error in configuration file /etc/dovecot/conf.d/90-sieve-extprograms.conf line 9: Unknown section name: plugin doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/90-sieve.conf line 24: Unknown section name: plugin 20-managesieve.conf does not cause error messages but does not correspond to what is described under https://doc.dovecot.org/2.4.1/core/plugins/imap_sieve.html -- Peter Varkoly SW Engineering(Systems) SUSE Software Solutions Germany GmbH Frankenstraße 146 D-90461 Nürnberg T +49-(0)911-740 53 0 E <varkoly(a)suse.com> https://www.suse.com/ (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer dovecot-pigeonhole version 2.4.1 The delivered example configuration files 20-managesieve.conf 90-sieve.conf 90- sieve-extprograms.conf have the syntax of 2.3 and dovecot 2.4.1 can not parse these. Following error messages occurs: Fatal: Error in configuration file /etc/dovecot/conf.d/90-sieve- extprograms.conf line 9: Unknown section name: plugin doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/90-sieve.conf line 24: Unknown section name: plugin 20-managesieve.conf does not cause error messages but does not correspond to what is described under https://doc.dovecot.org/2.4.1/core/plugins/ imap_sieve.html -- Peter Varkoly SW Engineering(Systems) SUSE Software Solutions Germany GmbH Frankenstraße 146 D-90461 Nürnberg T +49-(0)911-740 53 0 E <varkoly(a)suse.com> https://www.suse.com/ (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer

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sieve-filter editheader
by Claudinei Luís Bianchini 03 Apr '25

03 Apr '25

Hi, I'm trying to use the editheader extension of sieve, without success. If you can help, I would appreciate it. My setup looks like this: cat 90-sieve.conf plugin { sieve = file:~/sieve;active=~/.dovecot.sieve sieve_plugins = sieve_extprograms sieve_extensions = +body +editheader # with this line it doesn't work either: # sieve_global_extensions = +editheader } dovecot restarted ### # dovecot.sieve # ### # require [ "fileinto", "editheader", "body", "envelope", "imap4flags", "regex", "variables", "relational" ]; # ... sievec dovecot.sieve : dovecot: line 8: error: require command: unknown Sieve capability 'editheader'. dovecot: error: validation failed. sievec(root): Fatal: failed to compile sieve script 'dovecot.sieve' dovecot -n : root@email:/etc/dovecot/conf.d# doveconf -n # 2.3.13 (89f716dc2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.13 (cdd19fe3) # OS: Linux 5.10.0-23-amd64 x86_64 Debian 11.7 # Hostname: email.netcon.com.br auth_master_user_separator = * auth_mechanisms = PLAIN LOGIN deliver_log_format = from=%{from}, envelope_sender=%{from_envelope}, subject=%{subject}, msgid=%m, size=%{size}, delivery_time=%{delivery_time}ms, %$ dict { acl = mysql:/etc/dovecot/dovecot-share-folder.conf lastlogin = mysql:/etc/dovecot/dovecot-last-login.conf quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf } disable_plaintext_auth = no first_valid_uid = 2000 last_valid_uid = 2000 listen = * [::] login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k session=<%{session}> mail_attribute_dict = file:%Lh/dovecot-attributes mail_gid = 2000 mail_location = maildir:%Lh/Maildir/:INDEX=%Lh/Maildir/ mail_plugins = quota mailbox_alias acl mail_log notify mail_uid = 2000 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded- character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve namespace { inbox = yes location = mailbox Archive { auto = no special_use = \Archive } mailbox Archives { auto = no special_use = \Archive } mailbox "Deleted Messages" { auto = no special_use = \Trash } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox "Junk E-mail" { auto = no special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Items" { auto = no special_use = \Sent } mailbox "Sent Messages" { auto = no special_use = \Sent } mailbox Spam { auto = no special_use = \Junk } mailbox Trash { auto = subscribe special_use = \Trash } prefix = separator = / type = private } namespace { list = children location = maildir:%%Lh/Maildir/:INDEX=%%Lh/Maildir/Shared/%%Ld/%%Ln prefix = Shared/%%u/ separator = / subscriptions = yes type = shared } passdb { args = /etc/dovecot/dovecot-mysql.conf driver = sql } passdb { args = /etc/dovecot/dovecot-master-users driver = passwd-file master = yes } plugin { acl = vfile acl_shared_dict = proxy::acl imapsieve_mailbox1_before = file:/var/vmail/sieve/report_spam.sieve imapsieve_mailbox1_causes = COPY APPEND imapsieve_mailbox1_name = Junk imapsieve_mailbox2_before = file:/var/vmail/sieve/report_ham.sieve imapsieve_mailbox2_causes = COPY imapsieve_mailbox2_from = Junk imapsieve_mailbox2_name = * imapsieve_url = sieve://127.0.0.1:4190 last_login_dict = proxy::lastlogin last_login_key = # hidden, use -P to show it mail_log_events = delete undelete expunge copy mailbox_create mailbox_delete mailbox_rename mail_log_fields = uid box msgid size from subject flags mailbox_alias_new = Sent Messages mailbox_alias_new2 = Sent Items mailbox_alias_old = Sent mailbox_alias_old2 = Sent quota = dict:user::proxy::quotadict quota_grace = 10%% quota_status_nouser = DUNNO quota_status_overquota = 552 5.2.2 Mailbox is full quota_status_success = DUNNO quota_warning = storage=100%% quota-warning 100 %u quota_warning2 = storage=95%% quota-warning 95 %u quota_warning3 = storage=90%% quota-warning 90 %u quota_warning4 = storage=85%% quota-warning 85 %u sieve = ~/sieve/dovecot.sieve sieve_before = /var/vmail/sieve/dovecot.sieve sieve_dir = ~/sieve sieve_global_dir = /var/vmail/sieve sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment sieve_max_redirects = 30 sieve_pipe_bin_dir = /etc/dovecot/sieve/pipe sieve_plugins = sieve_imapsieve sieve_extprograms sieve_vacation_send_from_recipient = yes } protocols = pop3 imap sieve lmtp service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0666 user = postfix } unix_listener auth-master { group = vmail mode = 0666 user = vmail } unix_listener auth-userdb { group = vmail mode = 0660 user = vmail } } service dict { unix_listener dict { group = vmail mode = 0660 user = vmail } } service imap-login { process_limit = 500 service_count = 1 } service lmtp { executable = lmtp -L inet_listener lmtp { address = 127.0.0.1 port = 24 } process_min_avail = 5 unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } user = vmail } service managesieve-login { inet_listener sieve { address = 127.0.0.1 port = 4190 } } service pop3-login { service_count = 1 } service quota-status { client_limit = 1 executable = quota-status -p postfix inet_listener { address = 127.0.0.1 port = 12340 } } service quota-warning { executable = script /usr/local/bin/dovecot-quota-warning.sh unix_listener quota-warning { group = vmail mode = 0660 user = vmail } } service stats { fifo_listener stats-mail { mode = 0644 user = vmail } inet_listener { address = 127.0.0.1 port = 24242 } unix_listener stats-writer { group = vmail mode = 0660 user = vmail } } ssl = required ssl_cert = </etc/letsencrypt/live/imap.netcon.com.br/fullchain.pem ssl_cipher_list = EECDH+CHACHA20:EECDH+AESGCM:EDH+AESGCM:AES256+EECDH ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes syslog_facility = local5 userdb { args = /etc/dovecot/dovecot-mysql.conf driver = sql } protocol lda { lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes mail_plugins = quota mailbox_alias acl mail_log notify sieve } protocol lmtp { lmtp_save_to_detail_mailbox = yes mail_plugins = quota mailbox_alias acl mail_log notify sieve recipient_delimiter = + } protocol imap { imap_client_workarounds = tb-extra-mailbox-sep mail_max_userip_connections = 30 mail_plugins = quota mailbox_alias acl mail_log notify imap_quota imap_acl last_login imap_sieve } protocol pop3 { mail_max_userip_connections = 30 mail_plugins = quota mailbox_alias acl mail_log notify last_login pop3_client_workarounds = outlook-no-nuls oe-ns-eoh pop3_uidl_format = %08Xu%08Xv } root@email:/etc/dovecot/conf.d# -- Claudinei Luís Bianchini nei(a)netcon.com.br

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Late E-Mails
by Kent Borg 03 Apr '25

03 Apr '25

This morning I noticed e-mail out of sequence. I looked in `/var/log/mail.log` and postfix seems to have handled them correctly, recording the same things for them as any other e-mail, and in sensible sequence with the surrounding timestamps. But in my e-mail client (Thunderbird) some were delayed when viewed as I always do by "Order Received". These are the examples I noticed, when compared to surrounding messages: * 1 delayed ~3-hours, then 4-hours after that… * 7 delayed ~16-hours, followed immediately by… * 2 delayed over 5-hours. Other notes: * Thunderbird was not running at the time that these came in (that computer was asleep). * I am running dsync between two servers and both servers show the same details in Thunderbird (so syncing seems working). * I don't notice any dovecot errors in the log in the vicinity of when the delayed e-mails were processed by postfix, nor when the surrounding e-mails were processed by postfix. * There were no reboots during this period. * I do see some other little timestamp "errors", but these seem to be mailing list messages getting an internal timestamp a couple minutes before the message got delivered to my server (I also will see spam with completely false timestamps, but that it not what is going on here). Does Dovecot sometimes not notice new mail? Thanks, -kb/ / This morning I noticed e-mail out of sequence. I looked in `/var/log/mail.log` and postfix seems to have handled them correctly, recording the same things for them as any other e-mail, and in sensible sequence with the surrounding timestamps. But in my e-mail client (Thunderbird) some were delayed when viewed as I always do by "Order Received". These are the examples I noticed, when compared to surrounding messages: * 1 delayed ~3-hours, then 4-hours after that… * 7 delayed ~16-hours, followed immediately by… * 2 delayed over 5-hours. Other notes: * Thunderbird was not running at the time that these came in (that computer was asleep). * I am running dsync between two servers and both servers show the same details in Thunderbird (so syncing seems working). * I don't notice any dovecot errors in the log in the vicinity of when the delayed e-mails were processed by postfix, nor when the surrounding e- mails were processed by postfix. * There were no reboots during this period. * I do see some other little timestamp "errors", but these seem to be mailing list messages getting an internal timestamp a couple minutes before the message got delivered to my server (I also will see spam with completely false timestamps, but that it not what is going on here). Does Dovecot sometimes not notice new mail? Thanks, -kb

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Issue: Attachment from Later Email Appears on Earlier Email
by postfix_dovecot＠gmx.de 03 Apr '25

03 Apr '25

Hello, Today, I encountered a very strange phenomenon, and I'm not sure if Dovecot is involved: A user sent an email at 11:55 AM with a PDF attachment. When checking their inbox in Outlook, they noticed that this exact PDF had somehow been attached to an email that was originally received at 10:50 AM. I verified the timestamps in the logs, and they are correct. So essentially, the attachment from a later-sent email was appended to an earlier-received email sitting in the inbox-even though the two messages are completely unrelated. I have never seen anything like this before-how is this even possible? Does anyone have any advice? Thanks in advance! Jens Hello, Today, I encountered a very strange phenomenon, and I’m not sure if Dovecot is involved: A user sent an email at 11:55 AM with a PDF attachment. When checking their inbox in Outlook, they noticed that this exact PDF had somehow been attached to an email that was originally received at 10:50 AM. I verified the timestamps in the logs, and they are correct. So essentially, the attachment from a later-sent email was appended to an earlier-received email sitting in the inbox—even though the two messages are completely unrelated. I have never seen anything like this before—how is this even possible? Does anyone have any advice? Thanks in advance! Jens

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