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Email is one of the oldest forms of Internet communication. We use email to communicate with colleagues and friends, to participate in online communities, to confirm the identity and so on. By the way, SMTP protocol is older than HTTP. This tag groups articles about electronic mail and its inner mechanism.

Explaining SMTP ports 25 and 587

June 7, 2022June 7, 2022
SMTP port 25 vs 587 — difference

SMTP is one of the oldest application-layer protocols. It is used to deal with email. Despite it is called “Simple Mail Transfer Protocol”, it is in fact really complicated. One of the things that may confuse you is the vast amount of ports you need to open if you want to host an email relay. … Read more

Categories GNU/Linux Tags Email, SMTP, System Administration Leave a comment

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