IMAP from localhost (Squirrelmail) works, IMAP from remote (Outlook) does not authenticate

[Wayne Carrel]

I have been struggling with this for some time now. I have searched, tried, broke it, fixed it, and still no luck. Will somebody please help me see what is wrong?

 

[root at mail ~]# dovecot --version

2.2.36 (1f10bfa63)

 

[root at mail ~]# dovecot -n

# 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf

# OS: Linux 3.10.0-1160.2.2.el7.x86_64 x86_64 CentOS Linux release 7.9.2009 (Core)

# Hostname: mail.mydomainname.com

auth_mechanisms = plain login

disable_plaintext_auth = no

first_valid_uid = 1000

mail_location = maildir:~/Maildir

mbox_write_locks = fcntl

namespace inbox {

  inbox = yes

  location =

  mailbox Drafts {

    special_use = \Drafts

  }

  mailbox Junk {

    special_use = \Junk

  }

  mailbox Sent {

    special_use = \Sent

  }

  mailbox "Sent Messages" {

    special_use = \Sent

  }

  mailbox Trash {

    special_use = \Trash

  }

  prefix =

}

passdb {

  driver = pam

}

service auth {

  unix_listener /var/spool/postfix/private/auth {

    group = postfix

    mode = 0666

    user = postfix

  }

  unix_listener auth-userdb {

    group = postfix

    user = postfix

  }

}

service imap-login {

  inet_listener imap {

    port = 143

  }

  inet_listener imaps {

    port = 993

    ssl = yes

  }

}

ssl_cert = </etc/pki/dovecot/certs/dovecot.pem

ssl_key =  # hidden, use -P to show it

userdb {

  driver = passwd

}

 

>From maillog:

(Successful login from localhost via squirrel mail)

Dec 24 16:14:19 mail dovecot: imap-login: Login: user=<terry>, method=PLAIN, rip=::1, lip=::1, mpid=2279, secured, session=<CJKj9z23kN0AAAAAAAAAAAAAAAAAAAAB>

 

(Unsuccessful login from remote ip via Outlook)

Dec 24 16:13:53 mail dovecot: imap-login: Disconnected (auth failed, 1 attempts in 4 secs): user=<terry at mydomainname.com>, method=PLAIN, rip=75.xx.xx.xx, lip=198.xx.xx.xx, session=<1s/i9T23yspLRsWA>

 

I would be most grateful for any assistance anyone can provide -- my head is sore from beating against the wall! 😊

 

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