You definitely need outbound port 25/587 if you want to send email to others. | Hacker News

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		allset_ on April 25, 2019 \| parent \| context \| favorite \| on: The FreedomBox enables you to control your view of... You definitely need outbound port 25/587 if you want to send email to others.

scarhill on April 25, 2019 [–]

You need an outgoing mail server, but ISPs provide those, and typically don't block port 587.

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