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Topic: Incoming emails do not arrive - Only specific domains

Good Morning,

Please your help, I have a problem with the emails sent to me from a specific domain, the emails do not reach our mailboxes.


I was looking at the log / var / log / maillog and the following problem can be identified:

Nov 15 03:38:28 correo postfix/postscreen[4309]: CONNECT from [200.14.232.30]:11633 to [192.168.9.2]:25
Nov 15 03:38:28 correo postfix/postscreen[4309]: PASS OLD [200.14.232.30]:11633
Nov 15 03:38:28 correo postfix/smtpd[4310]: connect from mail.ath.com.co[200.14.232.30]
Nov 15 03:38:29 correo postfix/smtpd[4310]: NOQUEUE: reject: RCPT from mail.ath.com.co[200.14.232.30]: 450 4.7.1 <scanner02.ath.com.co>: Helo command rejected: Host not found; from=<CServicio@ath.com.co> to=<lider.mda@fasttrack.com.co> proto=ESMTP helo=<scanner02.ath.com.co>
Nov 15 03:38:29 correo postfix/smtpd[4310]: NOQUEUE: reject: RCPT from mail.ath.com.co[200.14.232.30]: 450 4.7.1 <scanner02.ath.com.co>: Helo command rejected: Host not found; from=<CServicio@ath.com.co> to=<soporte@fasttrack.com.co> proto=ESMTP helo=<scanner02.ath.com.co>
Nov 15 03:38:29 correo postfix/smtpd[4310]: NOQUEUE: reject: RCPT from mail.ath.com.co[200.14.232.30]: 450 4.7.1 <scanner02.ath.com.co>: Helo command rejected: Host not found; from=<CServicio@ath.com.co> to=<soporte2@fasttrack.com.co> proto=ESMTP helo=<scanner02.ath.com.co>


To keep in mind and is that the emails that we send to that domain if it reaches them, the problem is when they respond to the email from the remote side.

Muchas gracias.

2

Re: Incoming emails do not arrive - Only specific domains

y.restrepo wrote:

Nov 15 03:38:29 correo postfix/smtpd[4310]: NOQUEUE: reject: RCPT from mail.ath.com.co[200.14.232.30]: 450 4.7.1 <scanner02.ath.com.co>: Helo command rejected: Host not found; from=<CServicio@ath.com.co> to=<soporte@fasttrack.com.co> proto=ESMTP helo=<scanner02.ath.com.co>

You can whitelist it in /etc/postfix/helo_access.pcre like this:

/^scanner02\.ath\.com\.co$/ OK

# OR, allow all sub-domains:
#/\.ath\.com\.co$/ OK

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