On Thu, Apr 08, 2010 at 03:10:58PM -0700, John Schmitt wrote:
>
> I use fetchmail to get my email from yahoo & gmail et al. Lately I've been
> getting these two messages when fetchmail runs. What is postfix doing and
> what is it trying to tell me? Is this something I should fix on my end? Is
> postfix trying to resend some spam I received from yahoo? Or is it just
> having trouble delivering spam to my inbox?
>
> I'm running a simple home setup for myself using Fedora 12.
>
> Transcript of session follows.
>
> Out: 220 mymachine.mydomain.net ESMTP Postfix
> In: HELO mymachine
> Out: 250 mymachine.mydomain.net
> In: MAIL FROM:<>
> Out: 250 2.1.0 Ok
> In: RCPT TO:<"???B?\" <olpcxcqkkqc...@aol.com>>
This is forward-path syntax from RFCs 821, 2821 or 5321. You
can't just copy/paste the "To: " header from an RFC822 mail
message into the "RCPT TO:" SMTP command.
http://tools.ietf.org/html/rfc821
http://tools.ietf.org/html/rfc2821
http://tools.ietf.org/html/rfc5321
You should also keep in mind that is very wrong to determine who to
send email to based on "To:" or "Cc:" headers, you must determine the
intended recipient from an attribute that record the original envelope
recipient. Otherwise, you'll create nasty forwarding loops and misdeliver
email.
--
Viktor.
P.S. Morgan Stanley is looking for a New York City based, Senior Unix
system/email administrator to architect and sustain our perimeter email
environment. If you are interested, please drop me a note.
