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mms.att.net messages bouncing back from att mail as the address couldnt be found or is unable to receive mail.
Your message wasnt delivered to (insert my ph number here)@mms.att.net because the address couldnt be found or is unable to receive mail.
This worked up until 7/16/22 ish time frame and will work if I send from my work email
Security cameras running on Blue Iris as a NVR and when detects motion will email from a GMail account to another gmail on my phone (this works correctly) plus send one attachment in the MMS - this is the piece that stopped working. Gmail is using the added on O authorized authentication.
Its in the sending account that I see the bounce back of not found or unable mentioned above
I called AT&T tech support and they were clueless and after bouncing between a few support people I mysteriously got disconnected when it couldnt be figured out.
Any ideas?
sandblaster
ACE - Expert
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64.7K Messages
2 years ago
Yeah, don’t use Gmail. There is a known issue with email to text from gmail, most likely because so many spam texts are sent from gmail and they constantly get reported and blocked. I believe this has caused many gmail relay servers to be rejected.
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darryswife
New Member
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1 Message
1 year ago
I am having the same experience with one particular gmail account I created. We have four gmail accounts and have sent mms messages to the same phone number from all four and only one of them comes back with the error:
550 5.2.0 <gmail address> - mxtXpUddmZ4pQmxtXpT20i - Internal error
The one receiving the bounce is the account that needs this functionality. So where does the discrepancy lie? I am at the end of my ability to trouble shoot.
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