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email:configure-dovecot [2025/03/03 20:27] – willyemail:configure-dovecot [2025/03/13 14:05] (current) – [Configuring Dovecot] willy
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-====== Configuring Dovecot ======+====== G) Configuring Dovecot ======
  
 Dovecot configuation is stored in **/etc/dovecot**. There is a master file called **dovecot.conf** but most of the changes need to be applied to the files under **/etc/dovecot/conf.d**.  Dovecot configuation is stored in **/etc/dovecot**. There is a master file called **dovecot.conf** but most of the changes need to be applied to the files under **/etc/dovecot/conf.d**. 
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 Edit **doveconf.conf**: Edit **doveconf.conf**:
 <code> <code>
-protocols = imap sieve managesieve+protocols = imap lmtp sieve
 login_greeting = IMAP server ready. login_greeting = IMAP server ready.
 +# Optional DEBUG stuff to enable if things don't work:
 +#auth_verbose = yes
 +#auth_verbose_passwords = no
 +#auth_debug = yes
 +#auth_debug_passwords = yes
 +#mail_debug = yes
 +#verbose_ssl = yes
 </code> </code>
  
-===== Setup auth endpoint for postfix =====+===== Setup link to postfix =====
  
 Changes in **conf.d/10-master.conf**: Changes in **conf.d/10-master.conf**:
 <code> <code>
 +service lmtp {
 +  unix_listener /var/spool/postfix/private/dovecot-lmtp {
 +    group = postfix
 +    mode = 0660
 +    user = postfix
 +  }
 +
 service auth { service auth {
   unix_listener /var/spool/postfix/private/auth {   unix_listener /var/spool/postfix/private/auth {
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   }   }
 } }
 +</code>
 +
 +This is required because postfix will use dovecot to deliver mail to mailboxes internally and to perform SASL authentication as well.
 +
 +===== Setup Sieve =====
 +
 +Sieve let's you create custom filters that will filter your inbound emails.
 +
 +Changes in **conf.d/20-lmtp.conf**:
 +<code>
 +protocol lmtp {
 +  mail_plugins = $mail_plugins sieve
 +}
 +</code>
 +
 +And specify which folder should store the filters.
 +
 +Changes in **conf.d/90-sieve.conf**:
 +<code>
 +plugin {
 +  sieve = file:/home/vmail/storage/%d/%n/sieve;active=/home/vmail/storage/%d/%n/.dovecot.sieve
 </code> </code>
  
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 +===== Testing =====
 +
 +Start dovecot
 +
 +Check that login works:
 +<code bash>
 +doveadm auth test -a /var/spool/postfix/private/auth user@mydomain.com
 +</code>
 +
 +Test IMAP:
 +<code bash>
 +telnet mail.mydomain.com 143
 +Trying 1.2.3.4...
 +Connected to mail.mydomain.com.
 +Escape character is '^]'.
 +* OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN AUTH=LOGIN] IMAP </code>
 +
 +Test that login works:
 +<code bash>
 +telnet 127.0.0.1 1143
 +Trying 127.0.0.1...
 +Connected to 127.0.0.1.
 +Escape character is '^]'.
 +* OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN AUTH=LOGIN] IMAP server ready.
 +a login user@mydomain.com password
 +a OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY PREVIEW STATUS=SIZE SAVEDATE LITERAL+ NOTIFY SPECIAL-USE] Logged in
 +</code>
 +
 +Test TLS works:
 +<code bash>
 +openssl s_client -connect mail.mydomain.com:993
 +[ expect similar output as above ]
 +</code>
 +
 +Test STARTTLS works:
 +<code bash>
 +openssl s_client -connect mail.mydomain.com:143 -starttls imap
 +[ expect similar output as above ]
 +</code>
 +
 +If all those checks worked fine, your dovecot seems all set!