SMTP error – troubleshooting tips and solutions SMTP (Simple
Mail Transfer Protocol) which works in conjunction with POP3
(Post Office Protocol 3) is responsible for sending emails. You
will typically encounter an SMTP error through email clients
such as Outlook Express, Windows Mail, Windows Live Mail,
Outlook, Thunderbird etc. When such email programs are not able
to send an email you have composed, they display an SMTP error.
There can be very many causes for the SMTP error you receive and
on this page I shall tell you about some of the common ones.
This is written primarily for beginners and intermediate level
users to help them troubleshoot SMTP problems. Sending email
error – SMTP As mentioned, you’ll come across SMTP errors only
during the process of sending emails. During the process of
setup and configuration of an email account in an email client
using Post Office Protocol (POP), you will be asked to provide
the settings which would include the incoming (POP) server and
outgoing (SMTP) server detail