Alternative SMTP port

[JuanCar]

Hello
I would like to close port 25 and use other port for SMTP service and so avoid a lot of atempts to Access my SNTP port.
I followed all the steps in http://kb.parallels.com/en/837 included the last one, about close port 25 from external.

And now qmail can send mails but can not receive from external senders. Is there any solution for solve it? or qmail must listen port 25?

Thanks

 

[Nikolay.]

And now qmail can send mails but can not receive from external senders. Is there any solution for solve it?

No. How anybody except you would know the altered SMTP port?

 

[JuanCar]

Oh, I was afraid so.

Thank