We have one client who after 5 years of no problems all of a sudden can not send e-mails to us.
All e-mails they send us gets bounced back to them with the following error (NOTE: SENDER.com = their domain name; RECIPIENT.com = Our domain name:
---------------------------------------------------------
From: Postmaster@SENDER.com [mailto
ostmaster@SENDER.com]
Sent: Wednesday, May 21, 2008 8:47 AM
Subject: DELIVERY FAILURE: Error transferring to RECIPIENT.COM; SMTP Protocol Returned a Permanent Error 550 sorry, no mailbox here by that name.(#5.7.17)
Your message
Subject: BLAH BLAH BLAH
was not delivered to:
User@RECIPIENT.com
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Note, our DNS, MX and PTR records look correct. Any ideas? Is this a problem on their end or our end. Help, they keep coming at me saying it is our issue.
All e-mails they send us gets bounced back to them with the following error (NOTE: SENDER.com = their domain name; RECIPIENT.com = Our domain name:
---------------------------------------------------------
From: Postmaster@SENDER.com [mailto
ostmaster@SENDER.com]Sent: Wednesday, May 21, 2008 8:47 AM
Subject: DELIVERY FAILURE: Error transferring to RECIPIENT.COM; SMTP Protocol Returned a Permanent Error 550 sorry, no mailbox here by that name.(#5.7.17)
Your message
Subject: BLAH BLAH BLAH
was not delivered to:
User@RECIPIENT.com
-------------------------------------------------------
Note, our DNS, MX and PTR records look correct. Any ideas? Is this a problem on their end or our end. Help, they keep coming at me saying it is our issue.