Re: Strategies for working around "550 relaying prohibited"?

Giganews Newsgroups
Subject: Re: Strategies for working around "550 relaying prohibited"?
Posted by:  Ciaran Costelloe (ccostell…@flogas.ie)
Date: Fri, 16 Jun 2006

This is a simplification, but however:

Your SMTP server in work will only process emails that either come from
or are going to its domain (let's call it mywork.com).

When you are in work, it considers you part of its domain (it is
configured with an address range of IP addresses that it considers to
be work computers), so it will let you send an email to any destination.

When you are at home, it does not consider you part of its domain (your
IP address will be one of your ISP's addresses), so it will only accept
emails where the recipient is part of its domain, like Ma…@mywork.com.

Relaying is where a client like Ma…@myisp.com tries to get a
mywork.com server to send an email to custom…@somewhere.com: servers
don't allow this, because otherwise they could be used by an external
user to send spam for that user.

If you will only be sending invoices from work, then you will never
have a problem.  If you really need to send them from home, the server
has to be configured to allow you log on to it with a username and
password and then allow relaying.

Ciaran

Replies

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In response to

Strategies for working around "550 relaying prohibited"? posted by Mark Edwards on Fri, 16 Jun 2006