May 2023 - dovecot - dovecot.org

amount of users
by Thomas Schäfer 05 May '23

05 May '23

Hi, is somewhere a table/matrix/function based on experience how many users require which values for mail_max_userip_connections default_client_limit default_process_limit ...? I run into problems with a small group of users, since the defaults seem to be only for single man shows. The second assumption is: User are permanently online (connected to imap) and using two devices in average (one or two desktops, + one mobile device) Regards, Thomas -- There’s no place like ::1 Thomas Schäfer (Systemverwaltung) Ludwig-Maximilians-Universität Centrum für Informations- und Sprachverarbeitung Oettingenstraße 67 Raum C109 80538 München ☎ +49/89/2180-9706 ℻ +49/89/2180-9701

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dmarc user can't receive email because of encrypted storage
by efeizbudak＠disroot.org 04 May '23

04 May '23

Hi all, So recently google has been trying to send email to dmarc(a)domain.com on my server but I'm using encrypted storage and since the dmarc user has no password the email is being rejected with the error: May 4 16:51:50 domain dovecot: lda(dmarc)<3326><l0J9NabiU2T+DAAA1iAyAg>: Error: sieve: msgid=<10341808348719730099(a)google.com>: failed to store into mailbox 'INBOX': generate_keypair(INBOX) failed: mail_crypt_require_encrypted_user_key set, cannot generate user keypair without password or key How can I fix this, or at least read what the mail says? Would it be safe to just give dmarc user a strong password?

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Error: read() failed for file :: No buffer space available
by rudolf＠padaru.de 04 May '23

04 May '23

Hey there, ive got a situation with one of mine mailusers he cant access his mailbox and i cant resync the mailuser or access the mails with doveadm too: In maillog we got a lot of these errors, ist only m.73 that makes problems: Error: Syncing mailbox INBOX failed: read() /mdbox/storage/m.73: No buffer space available I dont really understand whats the problem here, the partition has ~500gb free space and all other mailboxes work fine on this server. Is there somebody who can give me a hint to solve this? First i thought the mdbox file is to obig, so i increased the mdbox_rotate_size limit without success. To restart the dovecot changes nothing too. In the dovecot journal i cant find other problems wo cause in this one, same in syslog, nothing special to see, like segfaults or so. My doveconf -n: # 2.3.19.1 (9b53102964): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.19 (4eae2f79) # OS: Linux 5.4.0-146-generic x86_64 Ubuntu 20.04.6 LTS auth_mechanisms = plain login auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@üÜöÖäÄ auth_worker_max_count = 60 default_vsz_limit = 1000 M disable_plaintext_auth = no imap_capability = +XLIST imap_logout_format = in=%i out=%o del=%{deleted} fetched_mails=%{fetch_hdr_count} lda_mailbox_autocreate = yes lda_mailbox_autosubscribe = yes lock_method = flock login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c mail_always_cache_fields = date.received date.sent imap.envelope hdr.x-spam hdr.x-virus-status hdr.return-path hdr.received flags mail_cache_min_mail_count = 30 mail_location = auto: mail_max_userip_connections = 30 mail_never_cache_fields = mail_plugins = " zlib" managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto 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 editheader imapflags notify vnd.dovecot.pipe vnd.dovecot.filter vnd.dovecot.execute mbox_read_locks = dotlock mbox_very_dirty_syncs = yes mdbox_rotate_size = 250 M namespace inbox { inbox = yes location = mailbox Archiv { auto = no special_use = } mailbox Drafts { auto = no special_use = } mailbox Junk { auto = no special_use = } mailbox Sent { auto = no special_use = } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = no special_use = } prefix = } passdb { args = /etc/dovecot/conf.d/zDovecot-sql.conf.ext driver = sql } plugin { sieve = ~/sieve/.dovecot.sieve sieve_after = ~/sieve_after/.dovecot_after.sieve sieve_before = ~/sieve_before/.dovecot_before.sieve sieve_dir = ~/sieve sieve_execute_bin_dir = /usr/local/bin/ sieve_execute_input_eol = lf sieve_extensions = +notify +imapflags +vnd.dovecot.pipe +vnd.dovecot.filter +vnd.dovecot.execute +editheader -reject sieve_filter_bin_dir = /usr/local/bin/ sieve_filter_input_eol = lf sieve_global_dir = /etc/dovecot/sieve/ sieve_max_redirects = 25 sieve_pipe_bin_dir = /usr/local/bin/ sieve_pipe_input_eol = lf sieve_plugins = sieve_extprograms sieve_redirect_envelope_from = recipient zlib_save = gz zlib_save_level = 6 } protocols = imap pop3 sieve service auth-worker { idle_kill = 1 mins } service auth { idle_kill = 1 mins unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } user = root } service imap-login { executable = /usr/lib/dovecot/imap-login process_min_avail = 4 service_count = 0 user = dovecot } service imap { process_limit = 1024 } service managesieve-login { inet_listener sieve { port = 4190 } service_count = 0 user = dovecot } service managesieve { process_limit = 1024 user = dovecot } service pop3-login { executable = /usr/lib/dovecot/pop3-login process_min_avail = 4 service_count = 0 user = dovecot } service pop3 { executable = /usr/lib/dovecot/pop3 process_limit = 1024 } service stats { unix_listener stats-reader { group = dovecot mode = 0666 } unix_listener stats-writer { group = dovecot mode = 0666 } } shutdown_clients = no ssl_cert = </etc/certs/ourCert.com.pem ssl_cipher_list = EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:E ECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:!aNULL:!eNU LL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS:!RC4 ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_prefer_server_ciphers = yes userdb { args = /etc/dovecot/conf.d/zDovecot-sql.conf.ext driver = sql } verbose_proctitle = yes protocol lda { mail_plugins = " zlib sieve zlib" rejection_reason = Your message to <%t> was automatically discarded:%n%r } protocol imap { imap_client_workarounds = delay-newmail mail_plugins = " zlib mail_log notify zlib" ssl = yes } protocol pop3 { mail_plugins = zlib pop3_client_workarounds = oe-ns-eoh outlook-no-nuls pop3_no_flag_updates = no pop3_uidl_format = %08Xu%08Xv ssl = yes } Size oft he mdbox-file: du -b m.73 262143997 m.73 Mit freundlichen Grüßen Yours sincerely <https://padaru.de/> Pascal Rudolf | Geschäftsführer PADARU-IT | Bielebohstraße 10 | 02736 Beiersdorf @: rudolf(a)padaru.de | www: <http://padaru.de/> padaru.de mobil: +49 (0) 17 772 595 32

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Help - Permissions issue with new mail
by michele.clark＠us.kbr.com 03 May '23

03 May '23

Hi all. We have an install of Dovecot running with Postfix and Roundcube using virtual mail to allow us to connect to our AD domain which got messed up after a power issue. I can log into our Roundcube and see all my old emails, however new emails keep getting stuck in the CUR files with permissions of -rw------- If I chmod the email it will deliver to the inbox in Roundcube. Can anyone advise on how I can adjust this so all new emails will come thru with the correct permissions? - Thanks in advance

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