Ok, so I ended up creating a sendgrid account to test this myself, and they clearly have an issue with mails ending in .no, so I’ve created a ticket with sendgrid
I tried signing up at a web-site that uses send-grid… but never received a verification e-mail. After trying different mail addresses, it seemed to be a problem with domains ending in “.no”
So I created my own sendgrid account, and here is what I found out:
1: signed up for an account, using mail “sendgrid@kentry.no” - worked flawlessly, received a mail confirmation.
2: created a single sender, also from my domain, - received an e-mail verification message to enable it at xxxx@kentry.no. so far so good.3: Sent a test message to a bunch of different e-mails xxx@kentry.no, yyy@kentry.no, xyz@batcat.no yyy@batcat.no and somemail@yahoo.com
Sendgrid claimed the mail was sent successfully, but it did NOT go through the *.no mail addresses.
Do note that we do not have any spam filters active on our domains; - and the fact that I DID receive mails when signing up proves that the fault lies elsewhere… so I assume the problem is within sendgrid itself, not managing to send to some.email@endingwith.no. Please advise.