SPF - defined 2003
DKIM - defined 2004
DMARC - defined 2012
Some mailserver admins still today: can you stop adding new stuff, we need more time to implement it. Don't rush us!
Le sigh.
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@vadim 23 year old lanes you could use but you still take that old road that people stopped using and now you blame them for the way things are for you ;)
I'm old school myself. My mailserver is basic dovecot and postfix. Proudly configured via ssh and config files in vi. If you're like that and want to know how to add SPF/DKIM/DMARC, I wrote it down for you at https://jan.wildeboer.net/2022/09/Email-3-TheRest/
Jan Wildeboer's Blog
Jan Wildeboer
0. The Journey - The basics and outlook (on the series, not the Microsoft mail client ;) 1. Postfix - the in and out, so to say. The robust, battle-hardened connection point for other mail servers on the internet to send emails to and receive emails from your domain(s). Also known as the MTA, the Mail Transfer Agent. 2. Dovecot - where you and your users talk to to get emails to their mail client, be it your smartphone, a mail client on your computer or just even the command line. It’s the IMAP server. 3. DKIM/DMARC/SPF - Just having postfix and dovecot up and running isn’t enough. We will also look at user authentication, letsencrypt certificates, DKIM, DMARC, SPF and the daily checks to make sure everything is humming along nicely. 4. The final stuff - How to make sure my e-mail server is happy and can do its job. Some simple checks, how to use fail2ban to keep bad servers and users away, checking log files, all those little things.
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Jan Wildeboer 😷:krulorange:
@jwildeboer Wait until you have that #IPv6 discussion with them.
@tubsta I don't 😊 My mailserver does SPF, DMARC, DKIM and happily talks both IPv4 and IPv6. Since 15 years. I am not the problem ;)
@jwildeboer POP3 before SMTP, because SMTP auth is bad!
@jwildeboer "just one more lane will fix the traffic" vibes :)