SMTP2Go Worldwide SMTP Email Service for Travelers!

SMTP and the source of the Problem

SMTP (or Simple Mail Transfer Protocol) is the protocol used by email servers to send emails across the Internet. Until 1990s, anyone could send an email using any SMTP server, which resulted in the well know junk email or spamming problem. Internet Service Providers had to make a change to fight spamming, and one solution to verify that the person that is sending the email is the real owner, and not just a spammer, was to ensure that this person was connecting from an authorized network location (or connecting from the same ISP network).

But, What if I am not connecting from an authorized network location?

So you are on that business trip, where you are connecting from a different ISP. And you get one of these errors in your Outlook Mail Client:

* The message could not be sent because one of the recipients was rejected by the server

* The rejected e-mail address was 'user@somedomain.com'. Subject: '', Account: '', Server: '', Protocol: SMTP, Server Response: '550 user@somedomain.com... Relaying Denied', Port: 25, Secure (SSL): No, Server Error: 550, Error Number: 0x800CCC79.

* The message could not be sent because one of the recipients was rejected by the server

* The rejected e-mail address was ''. Subject '', Account: '', Server: '', Protocol: SMTP, Server Response: '553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)', Port: 25, Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC79.

What To Do?
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