Mac Mail destroyed the Internet connection

Every once in a while when I travel and use a new Wifi (in a hotel of any public place) my bloody Mac Mail won't send.  Sometimes, it actually slows down my internet connection to the point where it is unusable.  If I disable Mac Mail, internet finally returns to normal for navigation.

Why does this happen? I know it has something to do with the "ports" or some other nonsense, but it drives me crazy!

Please after the release of Etrecheck here and someone can take a look at the configuration of the system.

When the problem occurs, use Console.app and activity Monitor.app to try to isolate what's going on.

Two of these tools are found in Applications > utilities.

Tags: Mac OS & System Software

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