[BlueOnyx:05733] 550 User unknown when sent to alias

[Bryan Parker]

Greetings BlueOnyx mailing list,

I have an issue with a server recently migrated from Blue Quartz to Blue 
Onyx using the CMU tool,
and I can't quite figure it out.

When an email gets sent to an alias, it is bounced back with 550 User 
unknown,
but when sent to a non-aliased address (original user), the mail goes 
through.
The /etc/mail/virtusertable and virtusertable.db files are being updated 
with the aliases when added through the GUI.

Not sure if this makes any difference, but I applied the following 
change to accomodate the MX records for this particular server: 
http://www.sendmail.org/faq/section4#4.5

Has anyone seen this behavior before?

Please let me know what additional information may be needed.
Any help is greatly appreciated.

-- 
Best regards,
Bryan Parker