SMTP Server Dovecot / Exim Authentication error

Question

Recently, I've installed the centOS 6. The purpose of the installation to use this server as Mail server. Where I've installed Exim version 4.84_2 #1 and Dovecot.

I've followed this blog post and I've tried to solve the below given error, however I do not have luck to resolve it.

  2017-02-06 07:07:27 no host name found for IP address x.x.x.x
    2017-02-06 07:07:32 dovecot_plain authenticator failed for ([x.x.x.x]) [x.x.x.x]: 535 Incorrect authentication data ([email protected])
    2017-02-06 07:07:40 dovecot_plain authenticator failed for ([x.x.x.x]) [x.x.x.x]: 535 Incorrect authentication data ([email protected])
    2017-02-06 07:07:48 dovecot_login authenticator failed for ([x.x.x.x]) [x.x.x.x]: 535 Incorrect authentication data ([email protected])
    2017-02-06 07:07:52 dovecot_login authenticator failed for ([x.x.x.x]) [x.x.x.x]: 535 Incorrect authentication data ([email protected])

Following is the output the configuration which I used from the above blog post.

[root@com-supportnet ~]# dovecot -n
# 2.0.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-642.11.1.el6.x86_64 x86_64 CentOS release 6.8 (Final) 
auth_mechanisms = plain login
auth_socket_path = /var/run/dovecot/auth-userdb
mail_location = maildir:~/mail
mbox_write_locks = fcntl
passdb {
  driver = pam
}
service auth {
  unix_listener auth-client {
    mode = 0777
    user = exim
  }
}
ssl_cert = /etc/ssl/mail.com-supportnet.work.crt
ssl_key = /etc/ssl/mail.com-supportnet.work.key
userdb {
  driver = passwd
}

Please let me know, how I can resolve this error.

Did you use pop3s or imaps on Dovecot? Why did you enable plain text login when you used secure pop3 and imap? — supriady, Feb 06 '17 at 08:09
Dovecot configuration : disabled_plaintext_auth= yes and ssl= required — supriady, Feb 06 '17 at 08:17
Starting Dovecot Imap: doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf line 39: Unknown setting: disabled_plaintext_auth [FAILED] — jacqueline fernandez, Feb 06 '17 at 08:39
Solved above errors, but I'm getting same error 2017-02-06 07:07:48 dovecot_login authenticator failed for ([x.x.x.x]) [x.x.x.x]: 535 Incorrect authentication data ([email protected]) — jacqueline fernandez, Feb 06 '17 at 08:46
Which authentication method did you use? You used Linux User or others to login to mailserver? By default, I used linux user to login to mailserver. — supriady, Feb 06 '17 at 09:57
Are you sure you're 'user' is 'exim'? In Debian for example the system user is 'Debian-exim' thought it appears you're using CentOS and perhaps they use 'exim'. — jeremiah, Apr 02 '18 at 19:11
@supriady 'plain' login can be used in conjunction with TLS. https://wiki2.dovecot.org/Authentication/Mechanisms — jeremiah, Apr 02 '18 at 19:15

score 0 · Answer 1 · answered Dec 25 '21 at 12:52

0

If anyone just bumps here as I did, I solved this in Gentoo via:

# cd /etc/pam.d/ && ln -s imap smtp

answered Dec 25 '21 at 12:52

user2397655

1

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SMTP Server Dovecot / Exim Authentication error

1 Answers1