Exchange 2003 error messages
Exchange 2003 is generating a 5.1.0 error when sending email to a known good address. The email is a reply to the sender who sent an email to me. How can I fix this and is it an indication of bigger issues?
Software/Hardware used:
Software/Hardware used:
ASKED:
June 13, 2011 2:39 PM
UPDATED:
June 15, 2011 7:29 AM
Answer Wiki:
Whether reply or just an email from the other side, you have to make sure:
1. That your exchange sends mails properly without errors
2. your exchange receives emails properly as well
3. does this error appear on specific recipients or always?
4. Is your exchange designed on Hub transport and Edge Transport?
5.How about sending emails within the organization?
6. Are you facing this problem on web outlook, or outlook or others?
7. Always make a backup for emails, so it won't be a big issue
the meaning is to isolate the problem
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This would mean the address was wrong or not liked by the server.
SMTP: Rsp: Command syntax error in parameters or arguments, 21 bytes
SMTP: Response = 501 Invalid Address
if you can paste the error into here (remove addresses we dont need to see them) as this may be connection or DNS or other such issues.
Carefully read their invalid address bounce back. They may have actually mispelled it and it is so close to being your correct address that you did not catch it. I see it all the time. Do others get the same message or just the one sender? That would be a good clue as well.