Archived Forum Post

Index of archived forum posts

Question:

SMTP 550 5.7.1 Unable to relay error

Aug 30 '13 at 09:30

What is a SMTP 550 5.7.1 unable to relay error?


Answer

A good explanation of this SMTP error can be found here:

http://www.eudora.com/techsupport/kb/1593hq.html