SMTP - Unable to relay mail.

Date Entered:  7/20/2004

Last Update:  7/20/2004

APPLIES TO

SYNOPSIS

I get the error "Unable to relay mail" or "Relaying not allowed" when sending email with SMTP.

SOLUTION

SMTP relaying is when a mail server accepts and relays on email sent to a different domain. Many mail servers do not support relaying. Those that do often require you to authenticate first (which you can do by specifying the User and Password properties before sending).

Instead of asking for relaying by sending email to a mail server that does not service the recipient, you can send the email to the recipients mail server (if you do not know it, you can discover it with the MX component).