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I would like to be able to run a SMTP server on port 25, but my ISP blocks it. Is there a way to use a different. I'm running XAMPP Mercury.

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My ISP optimum online blocks port 25 and port 80 for regular users. They claim lots of viruses and malware are spread on these ports. Spreading propaganda IMO since 99% of websites run on port 80. Well I upgraded to Boost which lets me use those ports.

Here are two discussions on Mercury and ISP's blocking port 25

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