Email Forwarding dosn't seem to be working

I set up email forwarding, From: mark.h@emissaryspace.com To: cine.harmon@gmail.com.  Then waited a few days and sent a test email to mark.h@emissaryspace.com but I didn't receive the forwarded email at cine.harmon@gmail.com. What could be the problem?

You followed this or which guide?

https://support.squarespace.com/hc/en-us/articles/19000909092237-Email-forwarding-with-a-Squarespace-domain

Yes I followed the guide you posted. Thanks

its working now. thanks for your help

Was there anything specific you had to do or did it just start working on its own?   I've the same scenario, but when sending to the forward, I get a "relay not permitted" error.  

Your message couldn't be delivered to email@forwardedemaildomain.com because the remote server is misconfigured. See technical details below for more information.

Never mind.  It was just a matter of time.  24+ hours and it all started working.  Guess it was a combination of having just started the new domain and trying to get forwarding going before all the propagation was completed. 

Hello, I've setup email forwarding.  Followed the guides.  None of the emails (I'm testing it) are coming through to my personal gmail account.  I set this up in March 2024, still no emails coming through in May.