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4 Messages

Wednesday, February 14th, 2024 3:11 PM

Production emails being blocked to AT&T customers

Our servers are being blocked by AT&T. We are getting the following rejection. 

reply=553 5.3.0 flph827 DNSBL:RBL 521< IPAddress >_is_blocked.For assistance forward this error to, stat=Data format error

We have sent numerous requests to have the servers unblocked but have not had any response from the abuse mailbox. If someone can reach out to me I can provider server names and IP addresses. 

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