Or manually telnet on 25 to yahoo and manually issue the SMTP commands and see what the responses from Yahoo are. You should see the reject before the DATA command and at that point you can just quit.
http://www.yuki-onna.co.uk/email/smtp.html -----Original Message----- From: Ben Scott [mailto:mailvor...@gmail.com] Sent: Wednesday, July 18, 2012 11:41 AM To: NT System Admin Issues Subject: Re: SPF record question Do they give a DSN code that implies SPF, or is it just a generic rejection message? (Note that Exchange is really bad about reporting the details of an SMTP transaction. You may need to crank up SMTP logging to find out what the other end is trying to tell you.) It could also be that Yahoo's rejecting mail for some other random reason. They're good at that. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe ntsysadmin
