SMTP issue

HCL Domino Domino Forum
1

Hi Frineds,An urgent query regarding SMTP.

My domino server is running SMTP Server that is required but some one can telnet SMTP on port 25 and can send spam mails. I want to stop this telnet facilty , I mean how can I block SMTP 25 port so that no one can telnet on this port but the domino server SMTP should run to do its job.

From where in domin can i do that.

Thanks

Deepak

2

Subject: SMTP issue

telnet is just a connection program, you can ask it to try and connect via any port number, not just the telnet port.

essentially telnetting to a machine using port 25 would be the manual equivalent of another mail server connecting to yours to deliver mail.

basically, there’s nothing you can do about it, and nothing you’d want to either.

3

Subject: RE: SMTP issue

or you might investigate using a product that can detect a telnet attempt to send spam as opposed to a legin smtp server sending. I am happy to assist you.just drop me a line to general.info@drcc.com

4

Subject: SMTP issue

Deepak , Just a suggestion,

You can change the SMTP port to something else and then work with your ISP to change the MX record to the the right Ip and new port I guess.

Cheers