On 2/1/2011 7:18 PM, Dean Gibson (Mail Administrator) wrote:
Running postfix-2.2.10-1.2.1.el4_7.centos:
When I try to send eMail to a person who uses Yahoo! as their
eMail provider, but to a non-Yahoo domain, I get:
Feb 1 16:34:59 mail postfix/smtp[10551]: 8CE431140DB: host
mx1.biz.mail.yahoo.com[68.142.202.129] said: 451 Resources
temporarily not available - Please try again later [#4.16.5].
(in reply to end of DATA command)
Postfix tried the first MX it found. This server was too busy
and deferred the message.
Feb 1 16:35:00 mail postfix/smtp[10551]: 8CE431140DB:
to=<u...@example.com>,
relay=mx1.biz.mail.yahoo.com[74.6.140.31], delay=2,
status=sent (250 ok dirdel)
Postfix tried another MX and it was accepted. (250 ok dirdel)
is Yahoo's acceptance code.
At this point, the mail is in yahoo's hands.
Maybe it was delivered to the recipient's spam folder? At any
rate, postfix has done its job.
Maybe some info here will be helpful.
http://help.yahoo.com/l/us/yahoo/mail/postmaster/
Has anyone else encountered this?
Yes.
Is Yahoo! adhering to
standards?
They accepted the mail and now take responsibility for its
disposition. The recipient will need to ask yahoo what
happened to it.
-- Noel Jones
