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Helo strings problem - Ip banned

romand700

Regular Pleskian
Hello,
I formatted my server and installed CENTOS 7 and PLESK 12. I have problems with cbl.abuseat.org. My ip enters in blacklist. I sent email to the support of abuseat.org and abuseat reply:

Please fix your HELO strings.

I check the my configuration and I think is correct:
- Reverse lookup is ok
- Hostname is ok (server.domain.tld)

But I have the file in /etc/sysconfig/network empty. There is only written:
# Created by anaconda

Also, is correct the my etc/hosts file?
127.0.0.1 server.domain.tld server localhost4 localhost4.localdomain4
:: 1 server.domain.tld server localhost6 localhost6.localdomain6

Any idea?

Regards,
 
Last edited:
Check that you have not blacklisted IP address in output of

# grep smtp_bind_address /etc/postfix/master.cf
 
Check that you have not blacklisted IP address in output of

# grep smtp_bind_address /etc/postfix/master.cf

For every domain I see:
plesk-domain.tld-00.000.00.000- unix - n n - - smtp -o smtp_bind_address=00.000.00.000 -o smtp_bind_address6= -o smtp_address_preference=ipv4 -o smtp_helo_name=domain.tld

Where 00.000.00.000 is my ip.. It's correct?

regards,
 
Just change this IP to other or kill spammer on your server.
 
Just change this IP to other or kill spammer on your server.
I formatted the server and change the IP. But also the new ip is finished in blacklist.. I do not believe that in the server exists spammers. Most domains use google apps.

How can I fix it?

regards,
 
I think that first of all you need to figure out why your IPs always puts in blacklist.
 
I think that first of all you need to figure out why your IPs always puts in blacklist.
I also do not understand. I write an email to the support of cbl.abuseat.org and reply with:

Please fix your HELO strings.

But this seems ok. You have other ideas where I can check?

Regards,
 
Sorry.. I see in a forum thread that the helo line is controlled by the smtpd_banner parameter in main.cf of postfix.

In my etc/postfix/main.cf the smtpd_banner is commented:

#smtpd_banner = $myhostname ESMTP $mail_name

Can I enable this line? It could bee an idea?

Regards,
 
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