Re:How we send 22k emails every hour
by KaiserPro on Tuesday July 30, 2019 @04:52AM
(#20563167)
Yeah:
o SMTP = postfix/exim/sendmail (hint don't use the last two)
o dkim, spf & reverse-dns are just DNS records. Spf is a list of IPs that your domain "owns", dkim is a hash that proves you own the originating server.
o Log parsing is standard log interrogation stuff. You are better off writing a custom metrics exporter that talks to the queue than parse logs routinely.
o SMTP = postfix/exim/sendmail (hint don't use the last two)
o dkim, spf & reverse-dns are just DNS records. Spf is a list of IPs that your domain "owns", dkim is a hash that proves you own the originating server.
o Log parsing is standard log interrogation stuff. You are better off writing a custom metrics exporter that talks to the queue than parse logs routinely.
o Greylisting is a configuration option for email relays where they reject the first attempt of unknown servers attempting to deliver mail. nothing more to it. (https://www.greylisting.org/implementations/postfix.php)
o rate-limiting is again a config option: https://www.vooservers.com/technical-blog/rate-limit-outboun...
o spam filtering: https://docs.iredmail.org/enable.dnsbl.html is a good start