216.17.132.35 is being blocked by AT&T. We (bivio.com) got the
auto-response (twice) from abuse_...@abuse-att.net, but it's been a week
without a change or email. Here's a sample log entry:

Dec 15 15:12:53 postfix/smtp[31789]: F1CCF8D3092: to=<redac...@bellsouth.net>,
relay=al-ip4-mx-vip1.prodigy.net[144.160.235.143]:25, delay=0.21,
delays=0.01/0/0.17/0.04, dsn=5.3.0, status=bounced (host
al-ip4-mx-vip1.prodigy.net[144.160.235.143] said: 553 5.3.0 alph758
DNSBL:RBL 521< 216.17.132.35 >_is_blocked.For assistance forward this error
to abuse_...@abuse-att.net (in reply to MAIL FROM command))

Anybody from AT&T able to help with this?

Thanks,
Rob
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