4 May
2007
4 May
'07
1:07 p.m.
One thing they are doing is connecting to my mail server and running a VRFY against the address you specify ( of course 99% of mail servers block verify) :
I'm pretty sure they do a callout with a <> (not a SMTP VRFY) as the mail from as the RFC's say is you send an email then you have to be able to accept bounces to it. So if you do a mail from: <> rcpt to:validemail(a)address then the from address is valid. Thanks