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[QUESTION] How do instances that use platforms such as Lemmy send verification, password reset, etc. e-mails? Do they use SMTP or some external service that provides an API? (lemmy.world)

submitted 5 months ago* (last edited 5 months ago) by Asudox@lemmy.world to c/opensource@lemmy.ml

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[–] smpl@discuss.tchncs.de 4 points 5 months ago* (last edited 5 months ago)

No, it's just a service that's running without me thinking about it.

My setup is:

debian as system
exim for smtp
courier for pop3
mariadb for accounts

But I'd like to make a point that's not being made in any of the other comments. It does not require an SMTP server to send e-mail. All you have to do is lookup the MX DNS record of the domain, connect to that SMTP server and write a few commands fx.:

EHLO senderdomain.tld
MAIL FROM:<yourmail@yourdomain.tld> 
RCPT TO:<recipient@recipientdomain.tld>
DATA
Subject: Blabla

Bla bla
.