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Emails are starting to be blocked/rejected (exim)

Discussion in 'E-mail Discussions' started by Forcerdj, Jun 16, 2014.

  1. Forcerdj

    Forcerdj Well-Known Member

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    Hi,

    Some clients are complaining that email is getting stuck in queue or bouncing back with error messages.

    Code:
     SMTP error from remote mail server after MAIL FROM:<xxxx@xxxxxxxx.com>
    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...

    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?
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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    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.
     
  3. Forcerdj

    Forcerdj Well-Known Member

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    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?
     
  4. cPanelMichael

    cPanelMichael Forums Analyst
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    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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