[anothaone]

Similar thing happened to me as well. I added another domain for a completely different project and their spam detection locked my account completely, including my main project I've been using for a long time before without any issues.

Got account unlocked after six hours of downtime though, but I changed email provider since then.

[Savageman]

I had this and the whole account was locked too after adding a "suspicious" one. But the delivery/reception was still working for other domains, only config changes were disabled.

It seems they do that on a TLD basis, for example if you add the domain "spammer.xyz", it will probably lock your account because ".xyz" TLD is considered risky.

They support always fix the problem, but we're always locked a few hours, this is super annoying.

[jadbox]

What did you change to?

[anothaone]

Postmark. Very happy with their service so far.

[inopinatus]

I'll chime in for Postmark as well.

As a B2B SaaS, our opportunity cost for support (and potential for lost goodwill) due to failed notifications is high, and switching to Postmark noticeably moved the needle. Time is our most valuable and scarce resource, and peer recommendation is our primary marketing device, so the price increment for switching to Postmark is easily justified. Their deliverability and support are stellar compared to Sendgrid, Mailgun, and SES.

Two thumbs up

See also: Fastmail over G suite for your mailboxes and calendaring.

[jadbox]

In what way does your B2B use Postmark? And do you use Fastmail for your company mailboxes? If so, why not just use Postmark to forward emails?

[jamesponddotco]

Another vote for Postmark here. They are more expensive, but worth every penny.

I do wish they would let you choose the region where the server is located though, like Mailgun does.