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A comment on Ask HN: How do services like Substack and Beehiiv send email?.

Re:Ask HN: How do services like Substack and Beehiiv send em... by geoah on Saturday April 15, 2023 @03:10AM (#35578352)
Pretty sure substack uses mailgun. If you dig substack.com for mx and txt records you’ll see that their spf includes mailgun and their mx records point to the same as well.
[ Parent | on HN ]
Re:Ask HN: How do services like Substack and Beehiiv send em... by boeing767 on Saturday April 15, 2023 @04:21AM (#35578710)
Oh, seems strange for them not to spin up their own mail-sending server.

Why not do that?

They're funded to the gills.

[ Parent | on HN ]
Re:Ask HN: How do services like Substack and Beehiiv send em... by geoah on Saturday April 15, 2023 @04:37AM (#35578772)
Their business is not sending emails, and until it becomes cheaper for them to DIY it most companies will outsource stuff that doesn't give them a competitive advantage.
[ Parent | on HN ]