The stupid question is the question not asked | |
PerlMonks |
Re^4: Determine if domain is actually used for emailby Limbic~Region (Chancellor) |
on Oct 04, 2011 at 19:17 UTC ( [id://929646]=note: print w/replies, xml ) | Need Help?? |
Your Mother,
I have no idea where UDP came into the conversation since SMTP is a TCP protocol. I agree that there is no way to be sure unless you can deliver mail to a recipient and get a DSN or, preferred, a response. Seeing if the server is listening on port 25 and is responding in a manner consistent with a SMTP server and not giving a 521 status code is a pretty safe bet though. Cheers - L~R
In Section
Seekers of Perl Wisdom
|
|