2026-02-20 16:38 UTC
@ArneBab@rollenspiel.social @jwildeboer@social.wildeboer.net
1. Get your outbound IP address ranges from a reputable supplier, ie not lowest-common-denominator mass-market retail ISP. L2TP tunnel them to where your system is hosted from a reputable supplier if you have to.
2. Matching Forward/Reverse DNS.
3. DMARC, DKIM, SPF.
4. Never send anything unsolicited to anyone ever.
5. Only ever email existing customers about updates to their current services or their current orders.
6. Use a domain name that isn't new with good reputation.
Replies (1)
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@ArneBab@rollenspiel.social 2026-02-20 16:52
@zymurgic@mastodon.online thank you! I’m asking because I know that my old university had a lot of problems with that (sending a newsletter once a year about the yearly conference to a few thousand subscribers and making sure to actually reach them all). @jwildeboer@social.wildeboer.net