Emails are starting to be blocked/rejected (exim)

Forcerdj

• June 16, 2014 08:50

Hi, Some clients are complaining that email is getting stuck in queue or bouncing back with error messages. SMTP error from remote mail server after MAIL FROM: SIZE=5927: host mx4.hotmail.com [65.54.188.72]: 550 SC-001 (BAY004-MC1F34) Unfortunately, messages from 5.77.35.140 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.
and another... [QUOTE]R=lookuphost T=remote_smtp defer (111): Connection refused
I've checked blacklists and all looks OK, email has been working great until a few days ago. I've checked mail queue and it's not all email but seems to be getting worse. Any ideas?

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  cPanelMichael

  • June 17, 2014 00:56

  Hello :) Per Outlook's mail troubleshooting URL in the output you provided: 550 SC-001 Mail rejected by Outlook.com 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. Ensure you have RDNS configured for the IP addressed used for sending email, and SPF/DKIM records added for your domain names. Beyond that, you can review the following document for advice on preventing SPAM: cPanel - Prevent Email Abuse Thank you.

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  Forcerdj

  • June 17, 2014 09:21

  spf/dkim/rdns is all configured we have been able to send email for quite some time it's only last few days. is there anything i can do in the interim? my clients obviously need to send email ASAP and it could take days-weeks-months to get whitelisted?

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  cPanelMichael

  • June 17, 2014 14:18

  You could obtain a new IP address and make it the default IP address for sending via: How to Change the Sending IP for Outbound Email in Exim Some mail servers may still block based on the hostname, but it's worth a shot if it's an emergency situation for your clients. Thank you.

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