How to tell if my ISP block port 25?
How can I tell if my ISP blocks port 25 connections?
What is the best way of going about this as I have just setup a mail server using the www.qmailrocks.org tutorial and all seems to be working well internally, but I cannot accept any emails from external sources. I have configured my smoothwall router to forward all port 25 requests to the correct macine, and surfing to http://mail.mydomain.com shows my webmail interface so why can I not get the emails from the external sources? Any suggestions would be welcome. Cheers Guys, Jamie |
mine do that until you prove your not an open relay!
Look on your ISP's website or ask them! they'll probably be able to test it over the phone and enable port 25 there and then. G |
www.grc.com scans your ports to see if they are open.
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to find all blocked ports scan your ip address from an external host with nmap.
nmap <ip addy> all ports blocked come up with the key word "filtered" |
What I do is stop mail services, setup telent server in xinetd.d to listen to 25. Then from external I telnet my server on 25.
This way I can certify if it's blocked or not... |
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Thanks all for your help and responses.
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Cheers guys, Jamie |
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have a look at no-ip.com They offer to redirect you mail to another port on your machine... You just specify no-ip as your mail manager (MX record in DNS) and they will receive the mail and redirect it on another port... Works great, it's my set-up and it's handling about 100 mail per day.. |
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Any suggestions? Jamie |
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