I have a domain name that was google domains and now transferred to squarespace. I did not previously have any email aliases set up but now I want to add some. I got the MX and TXT records from squarespace and added them to my Netlify records but emails are still not going through. Email bounces with the response
" Your message couldn’t be delivered to help@rangerrandomizer.com because the remote server is misconfigured. See technical details below for more information."
Are they correct? Not sure. Is the mailserver working as expected? Not sure either. But the records themselves are correctly propagated and working.
The fact that you get a message saying “Relaying denied” makes me believe that it’s your mailserver that malfunctioned. Otherwise, the mail would have failed in the DNS lookup stage itself as MX records would not have been found.
It was an issue with Squarespace. I had to go through customer support, send multiple screenshots showing I set things up correctly then they escalated my problem to engineering. A week later or so they got it working. Never said what was wrong