1 Topic by miles_hc

  • miles_hc
  • Member
  • Offline
  • Registered: 2011-07-04
  • Posts: 21

Topic: cannot send mails to hotmail.com error: 550 SC-001

==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====hi there,

cannot send mail to hotmial, rejected because of:

<mymail@hotmail.com>: host mx2.hotmail.com[104.44.194.233] said: 550 SC-001
    (SNT004-MC7F11) Unfortunately, messages from ip.of.my.mailserver 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. (in reply to MAIL
    FROM command)

tested at dkimvalidator,
dkim, spf functioning well.

checked at mxtoolbox.com, my server ip is green for all.

can send to gmail and other mail servers, just not ok with hotmail.com,
any admins here have any clues?

thanks in advance smile

Miles

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
  • iRedMail Developers
  • Offline
  • Registered: 2009-05-06
  • Posts: 31,088

Re: cannot send mails to hotmail.com error: 550 SC-001

Please visit the link in reject message, then search error code "SC-001(SNT004-MC7F11)"
http://mail.live.com/mail/troubleshooting.aspx#errors

3 Reply by miles_hc

  • miles_hc
  • Member
  • Offline
  • Registered: 2011-07-04
  • Posts: 21

Re: cannot send mails to hotmail.com error: 550 SC-001

Thanks for reply.

Yes, of course I did visiting the link, and also I'd checked the sender reputation, I checked the maillog for past 7 days in between Hotmail and my server. Nothing abnormal.

Maybe it is not error at my side, or not related to iredmail,  but if any mail admins there have the similar problem before, or any solutions.

Thanks in advance.

Miles

4 Reply by nadams

  • nadams
  • Member
  • Offline
  • Registered: 2014-04-19
  • Posts: 24

Re: cannot send mails to hotmail.com error: 550 SC-001

I vaguely recalled this problem - you will have to contact them to get removed. You can do everything under the sun correctly - but they manage their own private blacklist. The sad part is most of the spam I receive - comes from Microsoft domains....

nadams's Website