AT&T, I am unable to send email to [email protected] for blocklist mitigation. It worked Friday but attempts today are failing. If possible, could you please review the following IPs for blocklist removal for breach notifications?
74.202.227.59 74.202.227.60 74.202.227.61 Thank you, Justin Frechette iContact The original message was received at Tue, 24 Oct 2023 00:13:50 -0400 from mlpi433.enaf.sfdc.sbc.com [144.160.20.149] ----- The following addresses had permanent fatal errors ----- <[email protected]> (reason: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in local recipient table) ----- Transcript of session follows ----- ... while talking to a51-eastus2-prod-mtavm.az.3pc.att.com.: >>> DATA <<< 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in local recipient table 550 5.1.1 <[email protected]>... User unknown <<< 554 5.5.1 Error: no valid recipients
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