Log onto incoming mail server (POP3): Your e-mail server rejected your user name. Verify your user name for this account in Account Settings. The server responded: -ERR [AUTH] Plaintext authentication disallowed on non-secure (SSL/TLS) connections.
[root@mail /]# tail /var/log/maillog Feb 18 07:57:57 mail postfix/qmgr[27185]: B92853F355: removed Feb 18 07:58:18 mail dovecot: pop3-login: Disconnected (tried to use disallowed plaintext auth): user=<>, rip=106.51.68.183, lip=139.59.56.145, session=<5w+sZMlI/QBqM0S3> Feb 18 07:58:37 mail postfix/smtpd[28612]: warning: hostname mail.page-exports.com does not resolve to address 106.51.68.183: Name or service not known Feb 18 07:58:37 mail postfix/smtpd[28612]: connect from unknown[106.51.68.183] Feb 18 07:58:37 mail postfix/smtpd[28612]: BC4813F2FC: client=unknown[106.51.68.183] Feb 18 07:58:37 mail postfix/cleanup[28616]: BC4813F2FC: message-id=<> Feb 18 07:58:37 mail postfix/qmgr[27185]: BC4813F2FC: from=sasi@page-exports.in, size=1114, nrcpt=1 (queue active) Feb 18 07:58:37 mail postfix/smtpd[28612]: disconnect from unknown[106.51.68.183] Feb 18 07:58:56 mail postfix/local[28617]: BC4813F2FC: to=sasi.page-exports@mail.localdomain, orig_to=sasi@page-exports.in, relay=local, delay=18, delays=0.06/0/0/18, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME) Feb 18 07:58:56 mail postfix/qmgr[27185]: BC4813F2FC: removed
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Comments
Submitted by andreychek on Sat, 02/18/2017 - 09:06 Comment #1
Howdy -- it looks like the issue is that Dovecot is rejecting plaintext logins.
One option would be to connect using a secure method, such as using SSL/TLS option in Outlook. That would be the recommended method, and is the most secure.
Alternatively, if you prefer, we could change Dovecot to allow the insecure plaintext authentication.
Do you have a preference?