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bsreid
Beginner
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Message 1 of 2

smtpb1.bt.com gave this error

 

Hi  All   

Has  anyone got a  cure  for this   --  Neil O  had  some ideas a  few  weeks  ago 

inbound  from valid company  and valid   sender  to  self    @  BT 

smtpb1.bt.com gave this error:
550 5.7.1 Requested action not taken: message refused

thanks  

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1 REPLY 1
Les-Gibson
Recognised Expert
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Message 2 of 2

Re: smtpb1.bt.com gave this error

Only a guess but that sounds like an SSL problem to me., either the certificate is not valid or the BT servers don't recognise it.

Edit.

This may be helpful Fix email delivery issues for error code 550 5.7.1 in Exchange Online | Microsoft Docs


       
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