mail to hotmail and aol email accounts bouncing back

10138encourage · Postby **10138encourage** » Tue Oct 13, 2009 10:22 am

Hi,
I have a zimbra open source installation.
Emails sent to hotmail/live/aol email addresses have started to be bounced recently.
This is a sample log entry:
Oct 13 14:06:40 ENC4 postfix/smtp[5900]: 794A6C664F: lost connection with mx1.hotmail.com[65.55.92.136] while

sending$
Is this purely just a mailserver timeout issue or something more sinister?
The email bounces display this message which does suggest emails are being blocked purposely:
: host mx4.hotmail.com[65.55.92.184] said: 550

OU-002 Mail rejected by Windows Live Hotmail for policy reasons. Reasons

for rejection may be related to content with spam-like characteristics or

IP/domain reputation problems. If you are not an email/network admin please

contact your E-mail/Internet Service Provider for help. Email/network

admins, please visit MSN Postmaster for email delivery

information and support (in reply to MAIL FROM command)
Any help would be appreciated.
Thanks,
Andy

borngunners · Postby **borngunners** » Tue Oct 13, 2009 10:26 am

Check to see if your domain is not being blacklisted:

Email Blacklist Check - See if your server is blacklisted

2423bradb21 · Postby **2423bradb21** » Tue Oct 13, 2009 12:29 pm

Also don't run an email server from a dynamic address or dynamic subnet. If you choose to do so, you're results may be less than desirable. You will run into problems like you mentioned and/or your email will end up in spam quarantines.

uxbod · Postby **uxbod** » Tue Oct 13, 2009 2:38 pm

correct bradb21 ... use your ISP to relay .. even my mail-server would tarpit you if on a dynamic IP ;)

10138encourage · Postby **10138encourage** » Wed Oct 14, 2009 6:02 am

Thanks for the replies guys. I run the email server on a static IP address. I found my server was using a generic Reverse DNS PTR record. Which I've now got changed to one that points back to my "mail.mydomain.com". Hopefully this will help sort the problem.
Seems my mail server IP address does has one blacklist entry. I'll try and get that reversed. And in the meantime use ISP for outgoing mail, although this doesn't help with sending email via webmail/zimbra desktop.
Thanks.