Blacklisted from att

Hi,

As I'm user of AT&T, I recently noticed that you have blocked my IP/domain in the AT&T network. I think so because I checked the IP/domain in different blacklist providers (like https://mxtoolbox.com/blacklists.aspx and https://www.spamhaus.org/lookup/), but I'm not blocked in any.

The response I receive from you is the following: "5.3.0 flph834 DNSBL:ATTRBL 521< IP_x.x.x.x >_is_blocked. For assistance forward this error to abuse_rbl@abuse-att.net"

I read a lot of documentation and realized that I have the option to write to abuse_rbl@abuse-att.net to unblock the IP/domain.

But I have a question, if I do not write about IP/domain, which I want to unblock - if there is any period after which IP/domain will not be blocked already in AT&T network. Also what is the principle according to which IP / domain should be blocked?

Regards!