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Re: T-Mobile and Greylisting

Abdul Rehman Gani wrote:
I have a client for whom we have installed greylisting via spamd. They are having trouble with T-Mobile. They are running Postfix and it seems to be permanent failing on the 450 temp fail message. Does anyone have the IP(s) of the T-Mobile outgoing server(s)?

I had a similar problem with AT&T mobile SMS messages, their server would connect twice in a row and then return the message as undeliverable.

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