Zitat von Carlos Mennens <carlosw...@gmail.com>:

I had someone tell me today that they were unable to send email to
their customer from the mail server because they got the following
error:

*****************************************
Failed Recipient: u...@example.tld
Reason: Remote host said: 554 Service unavailable; Client host
[vss155.webhosting-email.com] blocked by zen.spamhaus.org;
http://www.spamhaus.org/query/bl?ip=74.235.192.80
*****************************************

The IP addres 74.235.192.80 is listed at Spamhaus PBL...


Now I noticed that they were able to send me emails fine to my Postfix
mail server shown below:

Oct 22 13:55:32 mail postfix/smtpd[10081]: connect from
vss155.webhosting-email.com[64.38.48.101]

The IP address 64.38.48.101 is NOT listed at Spamhaus....


Regards

Andreas


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