- dovecot - dovecot.org

Is this assumption correct?
by Tobi 24 Mar '19

24 Mar '19

Hello list we encounter a weird SSL issue with one of our dovecot (2.2.24 on Centos6) which we can only explain if our assumtion is correct Symptoms are that imaps connections (on port 993) suddenly get veeeery slow. Up to 180s for one connection with openssl s_client The thing we do not understand is that in the same time imap connections with starttls are just 1s. We can see that entropy on the affected system is not so high cat /proc/sys/kernel/random/entropy_avail 138 So our current theory is: we're running short of entropy but imaps connections are much more affected because they are encrypted from first bit. Whereas a starttls connection has an unencrypted part which generates some entropy it does not use. So I can add entropy to the system that other connections can use. We're open for any other theory but for the moment we believe (tm) that this is the reason that starttls is far more less affected than SSL Cheers tobi

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Re: Dovecot quota and Postfix smtpd_recipient_restrictions?
by Davide Marchi 24 Mar '19

24 Mar '19

>> Well, >> >> so the right syntax (in my case) would be: >> >> -o smtpd_recipient_restrictions = >> reject_non_fqdn_recipient,reject_unknown_recipient_domain,permit_sasl_authenticated,reject,check_policy_service >> inet:mailstore.example.com:12340 >> >> right?? > I configured it before the "permit_sasl_authenticated" and the "reject" > statement. > I've a doubt (again): Is it correct the the space between "[..]service" and "inet[..]"? As suggested here: https://blog.sys4.de/postfix-dovecot-mailbox-quota-en.html I've run: postconf smtpd_recipient_restrictions=check_policy_service inet:mailstore.example.com:12340 but obtain the error: postconf: fatal: missing '=' after attribute name: "inet:mailstore.example.com:12340" Please, which is the correct syntax? :-) Thanks again! Davide

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is it possible - username aliases
by Wojciech Puchar 23 Mar '19

23 Mar '19

i already have quite large dovecot installation with multiple domains but with users handled via unix passwd. Domain name mapping in both directions is done by sendmail, and mail delivery by procmail to Maildir format - one account per user. this accounts are often used for more than mail. So for example john smith have email john(a)foo.pl and unix username foo-john. His imap client and smtp client is configured to use login foo-john and email address john(a)foo.pl Everything works flawlessly. But i will have few new users that insist of being able to login as someone(a)somewhere.pl Can i have something similar to sendmail method in dovecot - an alias table like someone(a)somewhere.pl some-unix-account For this few users and have everything like it is now?

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quota-service with Director - A workaround
by Tom Sommer 23 Mar '19

23 Mar '19

I realize quota-service on Director is not supported, which is a shame. As a workaround I'm thinking of setting up quota-service on one of my backend nodes, and have all my Postfix services ask this one node for the quota status. This sort of defeats the purpose of the Director (having per-user assigned hot nodes), since now this one node running the quota-service will access all mailboxes to check the status of all inbound mail. Is this a problem though? In terms of NFS locking etc. etc.? -- Tom

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Send folder disappeared
by Esteban L 23 Mar '19

23 Mar '19

Hello, Dovecot 2.2.27 I have a strange issue, where my "Send" folder was absent in my mailbox. It had been there before, fully functioning. Then, it was gone. I went into: vi /etc/dovecot/conf.d/15-mailboxes.conf And, noticed that my mailbox for Sent was no longer automatically subscribed, so I changed it, and restarted dovecot. > # For \Sent mailboxes there are two widely used names. We'll mark > both of > # them as \Sent. User typically deletes one of them if duplicates > are created. > mailbox Sent { > special_use = \Sent > auto = subscribe > } > mailbox "Sent Messages" { > special_use = \Sent > } > } Now, Sent shows up again, but email I send, doesn't show up in the sent file?? The sent file is, and remains, empty. >

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Is this assumption correct?
by Tobi 23 Mar '19

23 Mar '19

Hello list we encounter a weird SSL issue with one of our dovecot (2.2.24 on Centos6) which we can only explain if our assumtion is correct :-) Symptoms are that imaps connections (on port 993) suddenly get veeeery slow. Up to 180s for one connection with openssl s_client The thing we do not understand is that in the same time imap connections with starttls are just 1s. We can see that entropy on the affected system is not so high cat /proc/sys/kernel/random/entropy_avail 138 So our current theory is: we're running short of entropy but imaps connections are much more affected because they are encrypted from first bit. Whereas a starttls connection has an unencrypted part which generates some entropy it does not use. So I can add entropy to the system that other connections can use. We're open for any other theory but for the moment we believe (tm) that this is the reason that starttls is far more less affected than SSL Cheers tobi

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Messages not saved to my "Sent" folder
by Esteban L 23 Mar '19

23 Mar '19

Hello, Using Dovecot 2.2.27 1. Had an issue where my Sent box, "disappeared." I used to be present, but then it was just gone. I went in and changed the /etc/dovecot/conf.d/15-mailboxes.conf the auto=subscribe feature had disappeared, even though I had added that line at setup. Below is the new changes. # For \Sent mailboxes there are two widely used names. We'll mark both of # them as \Sent. User typically deletes one of them if duplicates are created. mailbox Sent { special_use = \Sent auto = subscribe } mailbox "Sent Messages" { special_use = \Sent } } 2. But, mail is STILL not sent to SENT folder. 3. I have reload both postfix and dovecot, and also systemctl restart postfix && systemctl restart dovecot. The Sent folder is present, but no mail is stored to it. 4. Before sending this email, I checked my mobile client, and the Sent file was full from previously sent email. When I "updated it"/repolled it, it is now empty. Any able to lend a helping hand? Thanks.

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Maildirs on AWS EFS
by Rodolfo Gonzalez 22 Mar '19

22 Mar '19

Hello, AWS released one month ago a EFS system with administered life cycle, which means that files not accessed in the last 30 days are moved to a lower cost storage tier. Currently I hold my e-mail, delivered to Maildir++ folders by postfix and retrieved with Dovecot, in standard EBS volumes. This has the disadvantage that I need to allocate more than enough space to ensure that the volume won't get filled too soon. And this costs. Changing to standard EFS wasn't an option, since it's way more expensive than EBS. But, with the new system, costs are lower. I just have a doubt in the technical side: is it safe to have the email in EFS? I've read experiences about storing in S3 and using a driver to mount the bucket, and it seems that it's not a very good option. But EFS works like NFS4. Does anyone have experience mounting an EFS to store maildirs? Thanks in advanced, Rodolfo.

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Can't remove a folder created with doveadm import from IMAP client
by Francis 22 Mar '19

22 Mar '19

Hi, I imported mails with the doveadm import command. It worked great, but now, I'm unable to remove the folder backup-2019-03-22? In Thunderbird, the folder is displayed with grey italic font. The command I ran: doveadm import -u user(a)example.com mdbox:/var/vmail/domains/ example.com/user/mdbox-backup INBOX/backup-2019-03-22 all I found this help page from Mozilla: http://kb.mozillazine.org/Grey_italic_folders. It says Thunderbird display the folder in grey italic when the folder have the \Noselect flag. Is it the case with the problem I'm having? If yes, how to remove that flag on the folder? Thanks. -- Francis

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dovecot.sieve shows up as a mailbox
by Esteban L 22 Mar '19

22 Mar '19

Hello, Config infos below. Short version, I am getting this weird anomaly on my main email account. Such that, "dovecot.sieve" is showing up as a mailbox in my various email clients (e.g. k-9 (mobile), and Evolution). I have tried deleting the "rogue folder" with doveadm, but it just returns. Anyone have any suggestions where I can track this down. dovecot --version 2.2.27 dovecot -n # 2.2.27 (c0f36b0): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.16 (fed8554) # OS: Linux 4.9.0-6-amd64 x86_64 Debian 9.8 ext4 auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_verbose = yes auth_verbose_passwords = yes mail_debug = yes mail_location = maildir:/var/mail/vmail/%d/%n mail_plugins = " quota" mail_privileged_group = vmail 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 namespace inbox { inbox = yes location = mailbox Archive { auto = subscribe special_use = \Archive } mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { quota = maildir:User quota quota_grace = 10%% quota_rule = *:storage=10G quota_rule2 = Trash:storage=+1G quota_status_overquota = 552 5.2.2 Mailbox is full quota_warning = storage=95%% quota-warning 95 %u quota_warning2 = storage=80%% quota-warning 80 %u sieve = ~/.dovecot.sieve sieve_after = /etc/dovecot/sieve/spamfilter.sieve sieve_dir = ~/sieve } protocols = " imap lmtp sieve" service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0666 user = postfix } } service imap-login { inet_listener imaps { port = 993 ssl = yes } } service lmtp { unix_listener /var/spool/postfix/private/dovecot-lmtp { group = postfix mode = 0600 user = postfix } } ssl = required ssl_cert = </etc/letsencrypt/live/little-beak.com/fullchain.pem ssl_key = # hidden, use -P to show it userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } verbose_ssl = yes protocol lmtp { mail_plugins = " quota sieve" postmaster_address = esteban(a)little-beak.com } protocol lda { mail_plugins = " quota sieve" } protocol imap { mail_plugins = " quota imap_quota" }

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