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Asked: 2026-05-22T00:13:07+00:00

I’ve set up postfix on my ubuntu local server for internet mail. Up till

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I’ve set up postfix on my ubuntu local server for internet mail.

Up till now, I was sending emails via the local machine that was accepted into gmail, comcast, yahoo, and etc mail systems.

But, for some reason now, it randomly stopped pushing out those emails, except for my local network.

I double checked to see if my IP was blocked / spam block listed, but all blockers came back negative.

Any idea? Maybe something in the config went crazy. Even the mail.log and such weren’t showing updates, yet my local mail runs through fine.

Thanks,

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1 Answer

  1. Editorial Team

    Are you table to telnet to port 25 of any of those hosts? If you’re on a standard cable/DSL ISP, many of them will block access to “foreign” mail servers as a spam prevention measure. You may be able to get the ISP to exempt you from this policy, but you may have to relay your mails through their own SMTP server instead.

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