bounce mail problem where sender and recipient the same

[weite]

I've a question. If there is a incoming email where the sender and recipient is the same, than the bounce mail is send to the internal inbox of the user. Is there a possibility to disable the bounce mail if the recipient is internal?

The problem is that some spam emails have our mail adresse in sender and recipient and we got the bounce mail. I hope I was able to express myself clearly.

2023-11-07T15:10:42.255151+01:00 Mailgateway postfix/smtpd[193978]: connect from unknown[41.250.170.105]
2023-11-07T15:10:42.736321+01:00 Mailgateway postfix/smtpd[193978]: B3AEC2013CA: client=unknown[41.250.170.105]
2023-11-07T15:10:42.895440+01:00 Mailgateway postfix/cleanup[193995]: B3AEC2013CA: message-id=<654A536A.6000600@yyyyy.de>
2023-11-07T15:10:42.993187+01:00 Mailgateway postfix/qmgr[666]: B3AEC2013CA: from=<xxxxxx@yyyyyyy.de>, size=6275, nrcpt=1 (queue active)
2023-11-07T15:10:43.350924+01:00 Mailgateway postfix/smtpd[193978]: disconnect from unknown[41.250.170.105] ehlo=1 mail=1 rcpt=1 data=1 quit=1 commands=5
2023-11-07T15:10:47.355549+01:00 Mailgateway postfix/lmtp[193996]: B3AEC2013CA: to=<xxxxxx@yyyyyyy.de>, relay=127.0.0.1[127.0.0.1]:10024, delay=4.6, delays=0.26/0/0.05/4.3, dsn=5.7.1, status=bounced (host 127.0.0.1[127.0.0.1] said: 554 5.7.1 Rejected for policy reasons (201455654A456309C96) (in reply to end of DATA command))
2023-11-07T15:10:47.359389+01:00 Mailgateway postfix/qmgr[666]: B3AEC2013CA: removed

Thanks for the help!

 

[Bob.Dig]

How about not sending NDR in the first place. "Send out NDR when mail gets blocked" is 0 by default.

 

[weite]

That's the best way.
But sometimes we have customers that send a e-mail order and this email will than assessed as SPAM. In this case it is better when a customer is getting a email back. Than they can call us.

 

[Bob.Dig]

That's the best way.

That IP is listed almost everywhere. I would make use of the dnsbl_sites in the mail proxy.