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Contributor

 • 

2 Messages

Wed, Jul 10, 2019 8:02 AM

Delist/ Unblock IPs

Dear ATT team,

 

Our company sends emails on behalf of our clients. However, we have noticed that some IPs appear as blocked and emails are not delivered to your network.

 

Sender: multiple

Error: 553 5.3.0 flph831 DNSBL:RBL 521< 185.90.21.xxx >_is_blocked.For assistance forward this email to abuse_rbl@abuse-att.net

IPs blocked:

185.90.21.101

185.90.21.102

185.90.21.103

185.90.21.104

185.90.21.105

185.90.21.106

185.90.21.107

185.90.21.108

185.90.21.109

185.90.21.112

185.90.21.157

185.90.21.187

185.90.21.188

185.90.21.193

185.90.21.198

185.90.21.206

185.90.21.215

185.90.21.3

185.90.21.37

185.90.21.47

185.90.21.48

185.90.21.66

185.90.21.78

185.90.21.79

185.90.21.8

185.90.21.80

185.90.21.87

185.90.21.90

185.90.21.91

185.90.21.92

 

Could you please help us check why these IPs are blacklisted and assist me further in solving the issue ?

 

Thank you in advace.

Responses

Accepted Solution

Official Solution

Brand User
ATTHelp

Community Support

 • 

140.1K Messages

a year ago

Hello @gdeliv,

We understand that you're having trouble with emails on the block-list. Don't worry we can point you in the right direction.

The reason the emails could be on the block-list, could be related to spam. You need to contact the postmaster abuse team to get help with getting this resolved. You're going to email the block list group.

Charles, AT&T Community Specialist

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*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

Contributor

 • 

2 Messages

a year ago

Hello @ATTCares,

 

edited: thank you for your reply. I have sent to the postmaster email and worked!

 

 

Brand User
ATTHelp

Community Support

 • 

140.1K Messages

a year ago

Hello @gdeliv

Thanks for responding. If you've already emailed the postmaster, the best thing to do at this point is wait for their response regarding the blocked IP addresses.
Let us know if we can help you with anything else.

Mihai AT&T Community Specialist

Still need help? Ask a question! Our 1.4 million members typically respond within 1 hour.

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.

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