Email to SMS Gateway Failure


    Our church management software solution has recently experienced problems sending messages to users via Mailgun. (This works to all other email to SMS gateways.)


    We are getting a Server response: 550 permanent failure for one or more recipients ( message for every message sent.


    We've fiddled with several settings, but can't seen to make things work correctly. Perhaps srickar would be able to DM me and help out, as he has done in some previous posts, such as email to rejected for banned content  ? :-)


    Thanks so much for any help you can provide!

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