Monday, June 13, 2011

Can't send mail via SMTP with AT&T DSL Internet Services

AT&T Internet Services blocks port 25 by default. I think the reason is to prevent spam in the case that your computer is hijacked. You will need to call DSL technical support (1-800-288-2020) and request port 25 to be unblocked. They may ask why. Tell them you want to run your own SMTP server.

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