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Re: Text messages to T-Mobile users via groups.io #addmembers #sms

 

Raven,

I tried inviting myself as a test; ... except that the message is
rejected with
"Failed - 550 permanent failure for one or more recipients
(xxx@...:550 Sender IP reverse lookup rejected)"
If you want to pursue this ask your carrier specifically what that message means. Groups.io's outbound server should pass a reverse lookup, Gmail and other services seem satisfied enough with it.

See also:
/g/GroupManagersForum/topic/28078235
/g/GroupManagersForum/topic/32576348

Shal


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