I have a client (a law firm) that is unable to e-mail one of their clients at att.net.
We consistently get the following error: Failed to deliver to '[email protected]' SMTP module(domain att.net) reports: return-path address <[email protected]> rejected by ff-ip4-mx-vip2.prodigy.net: 553 5.3.0 flph385 DNSBL:ATTRBL 521< 68.66.149.18 >_is_blocked.__For_information_see_http://att.net/blocks I have gone to http://att.net/blocks and filled out the form three times over the last ~1 month and have never received a response. We have outbound SMTP blocked on their router for everything except their mail server. Can anyone at att.net provide assistance? Thanks, -A
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