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Re: SMS Message being blocked/filtered using SMTP by AT&T?

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bbiandov wrote:

wingrider01's post is irrelevant; nothing to do with html. AT&T is arbitrarily blocking SMTP; same problem here; upon testing I was impressed by their filtering; no matter what was the server that directly interfaced with AT&T's (google SMTP or O365) even if one of the flagged IPs or FQDN hosts is mentioned in the SMTP chain -- they will block it.

 

Changing that IP or FQND with temporary fake values fixes the problem. But that's not a fix, come on. What, if any, is AT&T's process to dispute? We don't have hookups on the inside of AT&T and front-end support peons are useless.

 

Any help will be appreciated. And NO and IPs are not black listed. AT&T just decided to block them???

 

 


nice necormancer, the thread is close to 2 years old, if you take the time to review the actual RFC that is the basis for the desing of the protocal you will see the answer


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