Is Port 25 (STMP) Blocked?

puya
Grasshopper

Hello,

Does Shaw block outbound STMP connections? I am trying to set my own STMP server and it seems that my connection is being blocked. I contacted chat support and they told me Shaw has not blocked any ports on their end. I have tested the server locally and it works and I have also checked my modem settings and there are no rules for blocking any ports. So I figured I ask here as well. My understanding is that some ISPs block outbound port 25 to help reduce spam and that you would have to contact them and ask specifically to open it for you. So here is my question again:
1) Is outbound port 25 blocked by Shaw?

2) If so can/will they open it upon request? Who should I contact?

3) If not do you know of any ISP that does allow STMP servers?


To clarify, my question is not about inbound traffic, I am asking about OUTBOUND. I know I need to setup port forwarding for inbound. (sorry for pointing out the obvious I had to repeat myself for the agent multiple times and he kept telling me that I don't have port forwarding set)

Pooya

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3 Replies

Re: Is Port 25 (STMP) Blocked?

Not applicable

1) Is outbound port 25 blocked by Shaw?

2) If so can/will they open it upon request? Who should I contact?

3) If not do you know of any ISP that does allow STMP servers?

1) Yes on dynamic IPs

2) Kind of..  If you get a static IP it will be open, a static IP requires a business account

3) Yes, the some of independent ISPs using DSL do (allow static IPs on residential accounts)

Other option is to use a SMTP relay.  Some of the free for low-volume emails are really good.  Most though, are not.  Or Shaw's SMTP relay (only thing you'll be able to connect to using 25)

Outgoing TCP 25 is the only port that Shaw blocks.

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Re: Is Port 25 (STMP) Blocked?

puya
Grasshopper

Thanks Kevin,

Where can I find more information about Shaw's SMTP relay service?


"Outgoing TCP 25 is the only port that Shaw blocks."

How about TCP 587? That one seems to be also blocked for me.

By the way, I'm just curious. Isn't port blocking against some net neutrality law?

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Re: Is Port 25 (STMP) Blocked?

Not applicable

I don't think it is against net neutrality, but I haven't tried applying SMTP blocking to the rules...  I run a number of mail servers, I quite like that majority of ISPs block customers from directly sending emails - too many infected machines sending SPAM....

TCP 587 is open.

As I said above, Outgoing TCP 25 is the only port that Shaw blocks.

Setup your email server to relay outgoing mail (sometimes called SmartHost) to mail.shaw.ca or shawmail.cg.shawcable.net port 25

You can also use 587 with a Shaw email username and password to mail.shaw.ca (your emails will still be 'from' the correct address, just allows you to log into the server)

Otherwise, yes any other email relay server using a port other than 25 will do.

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