Email won't send

Nikki Wilson asked:

2013-01-18 10:33:04 cwd=/home/USER/public_html/clients 3 args: /usr/sbin/sendmail -t -i
2013-01-18 10:33:04 1TwDwG-00023y-Ks <= USER@host.mydomain.com U=USER P=local S=3993 id=3e7cefe5079a84f36d64c08f99900d95@mydomain.com T="[Ticket ID: 787676] test" for EMAILUSER@hotmail.com 
2013-01-18 10:33:04 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1TwDwG-00023y-Ks
2013-01-18 10:33:04 1TwDwG-00023y-Ks SMTP connection outbound 1358523184 1TwDwG-00023y-Ks mydomain.com EMAILUSER@hotmail.com
2013-01-18 10:33:05 1TwDwG-00023y-Ks ** EMAILUSER@hotmail.com R=lookuphost  T=remote_smtp: SMTP error from remote mail server after MAIL FROM:<USER@nhost.mydomain.com> SIZE=5115: host mx2.hotmail.com [65.55.37.72]: 550 SC-001 (COL0-MC1-F11) Unfortunately, messages from weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.

What is wrong with hotmail? IP is not in any blacklists but hotmail won’t send my emails…

I have SPF enabled in my domain.

How do I enable DKIM?

My answer:


The URL that Hotmail gave you said, in relevant part:

550 SC-001
Mail rejected by Hotmail for policy reasons. Reasons for rejection may
be related to content with spam-like characteristics or IP/domain
reputation. If you are not an email/network admin please contact your
Email/Internet Service Provider for help.

Since you aren’t on any blacklists that I can find, and your Sender Score is 100, the next place to look is at the characteristics of the messages you are sending.

Again, as the URL that Hotmail gave you said, after you’ve resolved all of your issues, if you still can’t deliver mail, you can submit a support request.


View the full question and answer on Server Fault.

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