SMTP not working outside of office

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shiznatix
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SMTP not working outside of office

Post by shiznatix »

So, my works mail server for some reason does not want to work outside of our office. This makes very little sense to me because I don't remember ever putting a restriction on who can use it to send email. The only thing I can think of is one of the subdomains is hosted at the same IP but that still is a shady maybe.

Basically it just hangs when you try to send mail from outside the office IP. After a while I just get a connection timed out error. This is strange because I use IMAP to read my mail and have never had a problem, same server and everything.

So, can anyone help me out? Yes, I could email our host and get that all figured out but this way I might actually learn something.
nickvd
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Re: SMTP not working outside of office

Post by nickvd »

Most (if not all) ISP's here in Canuckistan block all outgoing smtp traffic to any server other than their own (they say it's to prevent spam). However, most host's SMTP servers would accept incoming traffic on port 587 as well as the default (25) so I just tell all my users to change the default port for smtp and everythings peachy!
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shiznatix
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Re: SMTP not working outside of office

Post by shiznatix »

Alas that did not work. How would I go about changing the port(s) that my smtp server accepts connections on?
nickvd
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Re: SMTP not working outside of office

Post by nickvd »

That would depend highly on which smtp server you are using :) (if it's behind nat, did you forward the appropriate port?)
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