Mail Not Coming

Support and Discussion General Discussion
1

Hello, I can send but not receive mail, can you please help, I’m in trouble with my clients

2

Happy New Year @ByEzel

Did you change anything on your postfix configurations?

3

I wish you a new year. no i didn’t do anything

4

Post the result of https://:8090/serverlogs/emaillogs or nano /var/log/maillog || vim /var/log/maillog

or

grep postfix /var/log/syslog

5 
Jan  3 21:02:52 localhost postfix/smtps/smtpd[178824]: disconnect from unknown[46.148.40.136] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:03:32 localhost postfix/smtps/smtpd[178656]: connect from unknown[46.148.40.196]
Jan  3 21:03:34 localhost postfix/smtps/smtpd[178826]: connect from unknown[46.148.40.94]
Jan  3 21:03:39 localhost postfix/smtps/smtpd[178656]: warning: unknown[46.148.40.196]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:03:39 localhost postfix/smtps/smtpd[178826]: warning: unknown[46.148.40.94]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:03:39 localhost postfix/smtps/smtpd[178826]: lost connection after AUTH from unknown[46.148.40.94]
Jan  3 21:03:39 localhost postfix/smtps/smtpd[178826]: disconnect from unknown[46.148.40.94] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:03:40 localhost postfix/smtps/smtpd[178656]: lost connection after AUTH from unknown[46.148.40.196]
Jan  3 21:03:40 localhost postfix/smtps/smtpd[178656]: disconnect from unknown[46.148.40.196] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:03:47 localhost postfix/smtps/smtpd[178824]: connect from unknown[46.148.40.114]
Jan  3 21:03:53 localhost postfix/smtps/smtpd[178824]: warning: unknown[46.148.40.114]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:03:54 localhost postfix/smtps/smtpd[178824]: lost connection after AUTH from unknown[46.148.40.114]
Jan  3 21:03:54 localhost postfix/smtps/smtpd[178824]: disconnect from unknown[46.148.40.114] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:04:07 localhost postfix/smtps/smtpd[178826]: connect from unknown[46.148.40.13]
Jan  3 21:04:12 localhost postfix/smtps/smtpd[178826]: warning: unknown[46.148.40.13]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:04:12 localhost postfix/smtps/smtpd[178826]: lost connection after AUTH from unknown[46.148.40.13]
Jan  3 21:04:12 localhost postfix/smtps/smtpd[178826]: disconnect from unknown[46.148.40.13] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:04:35 localhost postfix/smtps/smtpd[178656]: connect from unknown[46.148.40.135]
Jan  3 21:04:40 localhost postfix/smtps/smtpd[178656]: warning: unknown[46.148.40.135]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:04:41 localhost postfix/smtps/smtpd[178656]: lost connection after AUTH from unknown[46.148.40.135]
Jan  3 21:04:41 localhost postfix/smtps/smtpd[178656]: disconnect from unknown[46.148.40.135] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:05:23 localhost postfix/smtps/smtpd[178824]: connect from unknown[46.148.40.193]
Jan  3 21:05:29 localhost postfix/smtps/smtpd[178824]: warning: unknown[46.148.40.193]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:05:31 localhost postfix/smtps/smtpd[178824]: lost connection after AUTH from unknown[46.148.40.193]
Jan  3 21:05:31 localhost postfix/smtps/smtpd[178824]: disconnect from unknown[46.148.40.193] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:05:57 localhost postfix/smtps/smtpd[178656]: connect from unknown[46.148.40.189]
Jan  3 21:06:03 localhost postfix/smtps/smtpd[178656]: warning: unknown[46.148.40.189]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:06:04 localhost postfix/smtps/smtpd[178656]: lost connection after AUTH from unknown[46.148.40.189]
Jan  3 21:06:04 localhost postfix/smtps/smtpd[178656]: disconnect from unknown[46.148.40.189] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:06:14 localhost postfix/smtps/smtpd[178824]: connect from unknown[46.148.40.58]
Jan  3 21:06:19 localhost postfix/smtps/smtpd[178824]: warning: unknown[46.148.40.58]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:06:20 localhost postfix/smtps/smtpd[178824]: lost connection after AUTH from unknown[46.148.40.58]
Jan  3 21:06:20 localhost postfix/smtps/smtpd[178824]: disconnect from unknown[46.148.40.58] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:06:22 localhost postfix/smtps/smtpd[178656]: connect from unknown[46.148.40.197]
Jan  3 21:06:29 localhost postfix/smtps/smtpd[178656]: warning: unknown[46.148.40.197]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:06:30 localhost postfix/smtps/smtpd[178656]: lost connection after AUTH from unknown[46.148.40.197]
Jan  3 21:06:30 localhost postfix/smtps/smtpd[178656]: disconnect from unknown[46.148.40.197] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:07:02 localhost postfix/smtps/smtpd[178824]: connect from unknown[46.148.40.153]
Jan  3 21:07:06 localhost postfix/smtps/smtpd[178824]: warning: unknown[46.148.40.153]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:07:07 localhost postfix/smtps/smtpd[178824]: lost connection after AUTH from unknown[46.148.40.153]
Jan  3 21:07:07 localhost postfix/smtps/smtpd[178824]: disconnect from unknown[46.148.40.153] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:08:40 localhost postfix/smtps/smtpd[178824]: connect from unknown[46.148.40.77]
Jan  3 21:08:47 localhost postfix/smtps/smtpd[178824]: warning: unknown[46.148.40.77]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:08:47 localhost postfix/smtps/smtpd[178824]: lost connection after AUTH from unknown[46.148.40.77]
Jan  3 21:08:47 localhost postfix/smtps/smtpd[178824]: disconnect from unknown[46.148.40.77] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:09:01 localhost postfix/smtps/smtpd[178824]: connect from unknown[46.148.40.108]
Jan  3 21:09:07 localhost postfix/smtps/smtpd[178824]: warning: unknown[46.148.40.108]: SASL LOGIN authentication failed: Invalid authentication mechanism
Jan  3 21:09:07 localhost postfix/smtps/smtpd[178824]: lost connection after AUTH from unknown[46.148.40.108]
Jan  3 21:09:07 localhost postfix/smtps/smtpd[178824]: disconnect from unknown[46.148.40.108] ehlo=1 auth=0/1 rset=1 commands=2/3
Jan  3 21:09:20 localhost postfix/smtps/smtpd[178824]: connect from unknown[46.148.40.183]
6

Is this a clean install or you migrated your data over?

Which server os is this?

7

it’s a clean install, but the ip address seen here is not my server’s ip address, there’s something weird

8

Seems you have wrong configuration of TLS in this file /etc/postfix/master.cf causing SMTP authorization not to work

Post the contents of /etc/postfix/master.cf

9

what should I do

10

Post the contents of /etc/postfix/main.cf and /etc/postfix/master.cf