unable to send mail on the SMTP port 25

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I am unable to send mail as the SMTP port is getting blocked by McAfee antivirus as bulk mail. Of course if I disable it the mail works. But I just want to know how to avoid getting blocked. I noticed that applications such as thunderbird and outlook express do use the same SMTP port 25 (default) for outgoing mail and they do not get blocked.

The question is "is there any alternative ports that i can use or is there a way to avoid been detected as bulk mail, the same way as other email application such as outlook work?

Thanks & Regards, Rajeev Nair.


you might need to add exception for your program, in order to be able to send email