[BlueOnyx:05520] Re: Sendmail stops relaying email to valid local account 'user.name at domain.com' - no such user here!

[Ken - Precision Web Hosting, Inc]

----- Original Message ----- 
From: Jeff Jones
To: Blueonyx at blueonyx.it
Sent: Monday, October 04, 2010 3:30 AM
Subject: [BlueOnyx:05518] Sendmail stops relaying email to valid local 
account 'user.name at domain.com' - no such user here!


Very strange problem today - typical Monday - what is it with mondays?


A user has a mailbox user.name at domain.com - all is well. Nothing is changed 
on the mail server.


Today I get an email from her google mail account, telling me that no email 
is getting through to her account where the email address is 
user.name at domain.com. Hover - weirdly - email sent to an alias 
user at domain.com IS getting through.


The next thing I do is try to send her an email - and immediately, I get a 
bounce back - the error back is - 'no such user here'!?


I can log in to her account via the webmail - no problems.
I can send an email from her account to me - no problem.
But I can not send an email to her, using her username, because sendmail 
can't see this for some reason.


To resolve the issue I had to add 'user.name' in as an alias - even though 
this wasn't needed before.


I am concerned this might be an early sign of some horrible sendmail nasty - 
any one seen this issue before?


Any ideas?


Cheers,


Jeff

<<

Possibly the username was an added as an alias when the user was created, 
then someone later removed it as redundant, and that caused the automatic 
alias to be deleted.



----
Ken M
Precision Web Hosting, Inc.
http://www.precisionweb.net