550 5.7.511 Access denied, banned sender

alento · February 24, 2020, 1:02pm

That is just as bad as using no SMTP relay since the free tiers are abused by spammers.

sturner · February 25, 2020, 2:13am

wow, is postmark better.

alento · February 25, 2020, 4:59am

If it is a free tier available to all. No.

faisal · February 28, 2020, 4:23am

Yes, I whole-heartedly recommend Postmark

@alento Postmark’s Free Tier works differently. You apply for an account, fill out an interview and a human manually activates it or declines it. Their spam rate is very low.

alento · February 28, 2020, 2:45pm

Thanks, that is good to know. As I said, free tiers open to all are ripe with abuse. So it is good that Postmark is taking an active effort to prevent abuse.

sturner · February 28, 2020, 3:13pm

I do not see a Postmark Free Tier, anybody have a link