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bernieboy31
Posts: 80
Joined: 3/5/2005
From: London, United Kingdom
Status: offline
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error 550 to hotmail accounts - 3/20/2008 19:20:12
Gurus,
Up to last week-end I have been happily using a CDO script to send emails from my web site to ALL domains.
From around Sun/Mon 16th/17th Mar any emails to hotmail accounts have been "bounced" with
-- quote --
Final-Recipient: rfc822;"addressee"@hotmail.com
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550 SC-001 Mail rejected by Windows Live Hotmail for policy reasons. blah blah blah
--Unquote --
Messages to other domains don't seem to have the same problem so the scripted ("http://schemas.microsoft.com/cdo/configuration/smtpserver") ip address must be OK [I assume??].
I have taken this up with my hosting company and they say that they have raised it with hotmail and are awaiting a response. Are they giving me a BS statement and is there an easy fix?
Any bright ideas appreciated.
TIA
Cheers
Bernie
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Universal4
Posts: 86
Joined: 7/25/2003
Status: offline
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RE: error 550 to hotmail accounts - 6/8/2008 1:18:08
This could be a number of things, but the most common is a failure of an spf record or a failure of connection check (most commonly this fails due to a reverse dns lookup failure)
If the server is behind a firewall and the firewall uses nat, in some cases the firewall will need to be configured with a one-to-one nat instead of dynamic nat or this could cause the reverse lookup to fail because it could possibly be tagging the mail with the private ip.
Rick
Universal4
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