email system isn't accepting connection requests
My customers keep emailing me and are getting them kicked back with the following error:
Your message couldn't be delivered. Despite repeated attempts to contact the recipient's email system it didn't respond.
Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that their email system isn't accepting connection requests from your email system. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem.
I can forward the code that was sent.
sfpacking
shared this idea
There is an authentication error on your senders end, we recommend authenticating using DKIM. We have this article from Microsoft; https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/email-authentication-dkim-configure?view=o365-worldwide or you can contact them (Microsoft) directly for assistance.