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Letitgo11's profile

New Member


12 Messages

Monday, March 20th, 2023 5:13 AM

outlook to phone text or mmms not working

Please answer a question that has never got an answer.  Is there a reason ??              
Messages from Outlook to AT&T phone    DOES  NOT WORK!    why  not?       All other accounts work .....GMAIL  YAHOO AOL  etc...
There are numerous message questions in At&T   forums   as well as AT&T direct support.   
ONCE AGAIN your department has been supplied with error messages     and even        Diagnostic  information for administrators:    Many times. 
 ------    Remote server returned '550 5.4.300 Message expired -> 450 4.2.0 
What are you going to do to resolve this matter.    TODAY!   Remote server returned '550 5.4.300 Message expired -> 450 4.2.0 <[email scrubbed]>- dudDp3DOjK2ZWdudJpECGn - Service temporarily unavailable'
Messages from outlook to AT&T phone    DOES  NOT WORK    why  not?       Simple question asked numerous times.   What is the solution??  please advise.  TODAY

Remote server returned '550 5.4.300 Message expired -> 450 4.2.0 

Community Support


220.9K Messages

6 months ago

Hello Letitgo11, we're here to help you with email to text message.
Let's meet in a Direct Message, so that we can review your account. Please check your Direct Message inbox (it's the chat icon next to the bell icon in the upper right corner of the Forums).


Looking forward to speaking with you.

Carlton, AT&T Community specialist
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