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by foobarbecue 1278 days ago
Ah, my apologies, I jumped to conclusions that you were misusing "greylisting". I've never actually checked if I'm getting greylisted sending to large providers, but I think initial greylisting of new addressses is pretty reasonable.

My mail server (MailInABox) has postgrey enabled by default, greylisting incoming email each time email is received from a new address. I thought that was a little overzealous so turned it off.
1 comments
mschuster91 1277 days ago
It might be reasonable, but highly annoying if you run a, say, sign-up double opt-in or an email-based second factor/OTP. Customers don't like waiting an hour or whatever greylisting period, and so as a SaaS operator you are all but forced to go to one of the big e-mail senders like AWS SES because you don't stand a chance otherwise.
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foobarbecue 1277 days ago
Ah, darn... I'm starting a web app with email verification now, using my own email server for sending and I didn't consider this. Thanks for the warning. Guess I'm about to find out how bad it is.

Pretty annoying to test for this reliably as well...

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