1

Topic: blocking mail

i have 90 users, 10 users working in other city using datacard or broadband some time that ip blacklist in spamhaus.org and  barracudacentral.org they block my mails. plz help me how to resolve this problem.


message comes:

From: Mail Delivery System
[mailto:MAILER-DAEMON@mail.mydomain.com]
Sent: 31 January 2011 22:02
To: user9@mydomain.com
Subject: Undelivered Mail Returned to Sender

This is the mail system at host mail.mydomain.com.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

                   The mail system

<Tricia_Lesser@gymboree.com>: host sfmx2.gymboree.com[67.98.72.102] said:
554
    Service unavailable; Client host [mail.mydomain.com] blocked
    using Barracuda Reputation;
    http://www.barracudanetworks.com/reputa … 31.153.110 (in
    reply to end of DATA command)

2 (edited by maxie_ro 2011-02-01 17:28:44)

Re: blocking mail

What is SpamHaus & Barracuda blocking actually? Your server's IP or your remote computer's IPs? Because by what you say, it's the later, but this seems quite impossible, your users should send e-mail through your server, not directly.

P.S. Anyway, that IP is blocked on more than 2 BLs:
http://www.mxtoolbox.com/SuperTool.aspx … 1.153.110+

3 (edited by write4saini 2011-02-01 17:53:27)

Re: blocking mail

SpamHaus & Barracuda blocking  my remote computer's IPs and message retern to my users
-----Original Message-----
From: Mail Delivery System
[mailto:MAILER-DAEMON@mail.mydomain.com]
Sent: 31 January 2011 22:02
To: user2@mydomain.com
Subject: Undelivered Mail Returned to Sender

This is the mail system at host mail.mydomain.com.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own text from the attached returned message.

                   The mail system

<Tricia_Lesser@gymboree.com>: host sfmx2.gymboree.com[67.98.72.102] said:
554
    Service unavailable; Client host [mail.mydomain.com] blocked
    using Barracuda Reputation;
    http://www.barracudanetworks.com/reputa … 31.153.110 (in
    reply to end of DATA command)





my mail server ip is different xxx.180.55.xxx and it's not black listed any spamhaus and others
plz help

4

Re: blocking mail

Resolved my self with google help

for this use postfix header_check
vi /etc/postfix/main.cf
# header_checks = regexp:/etc/postfix/header_checks
to
header_checks = regexp:/etc/postfix/header_checks
save main.cf
vi /etc/postfix/header_checks
add this line
/^Received:.*\(unknown/ IGNORE
save and restart postfix