[CentOS] sendmail Deferred mail - reason unknown

Toby Bluhm tkb at alltechmedusa.com
Mon Dec 15 17:00:47 UTC 2008

Sean Carolan wrote:
> "I'm a bit baffled by this problem.  Maybe there's a sendmail guru out
> there who can help me out here.  We have some end-users who need to
> receive system-generated mail that originates from a java-based
> application on our network.  The java app sends the mail through our
> sendmail cluster, which then sends the email on to the end-user over
> the Internet.  The size of the emails can range from a few kb up
> through around 2Mb in size."
> I should probably add that each of these emails has an attached file,
> which accounts for the large size of the emails.  Also, sorry if my
> previous email was sent in HTML format, I think I might have had "rich
> text" turned on in Gmail.

just a WAG from notta guru . . .

Perhaps someone has a greylist filter running & your outbound emails 
look different enough to trigger it every time. They could whitelist you 
as a fix.


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