<!doctype html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<p class="default-style">Hi,<br></p>
<p class="default-style">last friday I upgraded from dovecot-2.3.10.1_2 to dovecot-2.3.11.3 (FreeBSD).<br></p>
<p class="default-style">Since then, I started having some issues with some customers.<br></p>
<p class="default-style">The log I see is like:<br></p>
<p class="default-style"><br></p>
<p class="default-style">pop3-login: Disconnected (tried to use unsupported auth mechanism): user=<username@domain.it>, method=USER, rip=x,y,x,z, lip=x,y,w,z, session=<e5KkR5qto8hPAL9q></p>
<p class="default-style"><br></p>
<p class="default-style">While, before upgrade, same user logged succesfully:<br></p>
<p class="default-style">pop3-login: Login: user=<username@domain.it>, method=PLAIN, rip=x,y,x,z, lip=x,y,w,z, mpid=62876, session=<dMRmGWCtFtJtdcy6></p>
<p class="default-style">This is my conf (unchanged since months):<br></p>
<p class="default-style"><br></p>
<p class="default-style"># dovecot -n<br># 2.3.11.3 (502c39af9): /usr/local/etc/dovecot/dovecot.conf<br># OS: FreeBSD 12.1-RELEASE-p8 amd64 zfs<br># Hostname: server<br>doveconf: Warning: please set ssl_dh=</usr/local/etc/dovecot/dh.pem<br>doveconf: Warning: You can generate it with: dd if=/var/db/dovecot/ssl-parameters.dat bs=1 skip=88 | openssl dhparam -inform der > /usr/local/etc/dovecot/dh.pem<br>auth_mechanisms = plain login digest-md5 cram-md5<br>auth_verbose = yes<br>auth_verbose_passwords = yes<br>default_client_limit = 2000<br>default_process_limit = 500<br>default_vsz_limit = 512 M<br>disable_plaintext_auth = no<br>first_valid_gid = 125<br>first_valid_uid = 125<br>imap_id_log = *<br>mail_gid = 1003<br>mail_location = maildir:/mail/domains<br>mail_privileged_group = postfix<br>mail_uid = 1003<br>namespace inbox {<br>inbox = yes<br>location = <br>mailbox Drafts {<br>special_use = \Drafts<br>}<br>mailbox Junk {<br>special_use = \Junk<br>}<br>mailbox Sent {<br>special_use = \Sent<br>}<br>mailbox "Sent Messages" {<br>special_use = \Sent<br>}<br>mailbox Trash {<br>special_use = \Trash<br>}<br>prefix = <br>}<br>passdb {<br>args = /usr/local/etc/dovecot/dovecot-sql.conf.ext<br>driver = sql<br>}<br>passdb {<br>args = /etc/dovecot/dovecot-sql-crypt.conf.ext<br>driver = sql<br>}<br>service auth {<br>unix_listener /var/spool/postfix/private/auth {<br>group = postfix<br>mode = 0666<br>user = postfix<br>}<br>unix_listener auth-userdb {<br>group = postfix<br>mode = 0600<br>user = postfix<br>}<br>}<br>service imap {<br>process_limit = 1024<br>}<br>service lmtp {<br>unix_listener /var/spool/postfix/private/dovecot-lmtp {<br>group = postfix<br>mode = 0600<br>user = postfix<br>}<br>}<br>ssl_cert = </etc/ssl/wildcard.domain.net_bundle.crt<br>ssl_dh = # hidden, use -P to show it<br>ssl_key = # hidden, use -P to show it<br>userdb {<br>args = /usr/local/etc/dovecot/dovecot-sql.conf.ext<br>driver = sql<br>}<br>protocol imap {<br>mail_max_userip_connections = 100<br>}</p>
<p class="default-style"><br></p>
<p class="default-style">any help?<br></p>
<p class="default-style">Thank you!<br></p>
<p class="default-style"><br></p>
</body>
</html>