OH works for a small company who have an outsourced ICT guy who does their email setup etc.
they are having issues with emails bouncing back from webmail accounts, getting the following reply:
Their IT guy recommends people change their email accounts....The original message was received at Fri, 4 Mar 2011 07:56:05 GMT from [192.168.7.34]
----- The following addresses had permanent fatal errors ----- <[email address removed]@hotmail.co.uk>
(reason: 550 SC-001 Unfortunately, messages from [ip address removed] weren't sent. Please contact your Internet serv...ock list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.)
----- Transcript of session follows ----- ... while talking to
>>> MAIL From:<[email address removed]> SIZE=443159
<<< 550 SC-001 Unfortunately, messages from [ip address removed] 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.
554 5.0.0 Service unavailable
Suddently not being able to send to a domain that's always worked before is often related to spam blacklists.
Have a look at the page referenced in the email:
Troubleshooting and scroll to the entry for 550 SC001, which says:
Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics
To check this out, get the public IP address of the mail server and head on over to Email Blacklist Check - See if your server is blacklisted and look it up.
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