telnet 192.168.0.6:25 'this responds with the mail server infor helo my.domain.com 'sends request to mail server mail from: <firstname.lastname@example.org> ' you need this so their is a sender should reply ok rcpt to: <email@example.com> ' this will check for a valid mailbox on that domain
220 nt.massmind.org ESMTP server (Post.Office v3.5.3 release 223 ID# 0-0U10L2S100V35) ready Tue, 11 Sep 2001 12:22:27 -0700 HELO nt.massmind.org 250 nt.massmind.org MAIL FROM:<firstname.lastname@example.org> 250 Sender <email@example.com> Ok rcpt to:<firstname.lastname@example.org> 550 Invalid recipient <email@example.com> rcpt to:<firstname.lastname@example.org> 250 Recipient <email@example.com> Ok
|file: /Techref/inet/smtpvalidate.htm, 1KB, , updated: 2012/11/16 13:26, local time: 2019/9/21 16:25,
|©2019 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?|
<A HREF="http://www.sxlist.com/techref/inet/smtpvalidate.htm"> Validating and email address before (or without) sending an email</A>
|Did you find what you needed?|
Welcome to sxlist.com!
& kind contributors
just like you!
Please don't rip/copy
Copies of the site on CD
are available at minimal cost.
Welcome to www.sxlist.com!