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Please help with IP Address Blocking

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Please help with IP Address Blocking

We are a web-hosting company and are having problems sending emails to a client of us with a sbcglobal.net email address, from 2 different email addresses and two different IPs

    host al-ip4-mx-vip1.prodigy.net []
    SMTP error from remote mail server after MAIL FROM::
    553 5.3.0 alph165 DNSBL:ATTRBL 521< >_is_blocked.For assistance forward this email to  @abuse-att.net

    Same happens when sending emails from another IP -

    We have very strict policies against spam and restrict a lot our customers from sending newsletters,  so there should be no reason for being blacklisted... we are not on any RBL

    Would you please unblock those 2 IPs for us, and

    We would appreciate that since need to regularly contact our customer at an sbcglobal.net email address    

    Pls advise


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Accepted by Administrator (Administrator)
Accepted by davidbk
‎08-28-2018 8:41 AM

Re: Please help with IP Address Blocking

Hello, @Harpwro
We understand how much of a hassle this could be. You would need to reach out to report your complaint to abuse@att.net, Someone will get back to you in help get your IP addresses unblocked. Charles, AT&T Community Specialist

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