--On Wednesday, December 07, 2005 18:01:30 -0500 Michael Sherman <[EMAIL PROTECTED]> wrote:

relay=smtp-rog.mail.yahoo2.akadns.net[206.190.36.18], delay=0,
status=bounced (host smtp-rog.mail.yahoo2.akadns.net[206.190.36.18]
said: 530 authentication required - for help go to
http://help.yahoo.com/help/us/mail/pop/pop-11.html (in reply to MAIL
FROM command))
Dec  7 17:46:09 FreeBSD postfix/cleanup[14941]: C244750865:
message-id=<[EMAIL PROTECTED]>
Dec  7 17:46:09 FreeBSD postfix/qmgr[14908]: C244750865: from=<>,
size=2600, nrcpt=1 (queue active)
Dec  7 17:46:09 FreeBSD postfix/qmgr[14908]: 70BED50856: removed
Dec  7 17:46:09 FreeBSD postfix/smtp[14942]: C244750865:
to=<[EMAIL PROTECTED]>,
relay=smtp-rog.mail.yahoo2.akadns.net[206.190.36.18], delay=0,
status=bounced (host smtp-rog.mail.yahoo2.akadns.net[206.190.36.18]
said: 530 authentication required - for help go to
http://help.yahoo.com/help/us/mail/pop/pop-11.html (in reply to MAIL
FROM command))
Dec  7 17:46:09 FreeBSD postfix/qmgr[14908]: C244750865: removed

Any ideas?

Yahoo wants authentication. Postfix doesn't do smtp-auth between mailhosts, and it's not going to pass your credentials to the Yahoo MTA after you've logged in to it.

You need to ask Yahoo if they will consider your MTA a trusted host for relay purposes.

Paul Schmehl ([EMAIL PROTECTED])
Adjunct Information Security Officer
University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu/ir/security/
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