Access denied, banned sending IP

Question

Sendmail from iptcauto6.app.global.com stopped working today after working for years. Getting this message in /var/spool/mail/pgillis:

<philip.gillis@global rajesh .com>: host
global-com.mail.protection.outlook.com[104.47.30.74] said: 550 5.7.606
Access denied, banned sending IP [131.228.56.64]. To request removal from
this list please visit https://sender.office.com/ and follow the
directions. For more information please go to
http://go.microsoft.com/fwlink/?LinkID=526655 AS(1430) (in reply to RCPT TO
command)

Note Access denied, banned sending IP [131.228.56.64].

how to fix it please?

Answer 1

Hi @Microsoft Q & A ,

It is recommended that you refer to this article: use-the-delist-portal-to-remove-yourself-from-the-office-365-blocked-senders-lis

Generally, when an IP was detected to send bulk emails or lots of spam from the IP, this IP was banned by office 365, which prevents all further communication between the IP address and any of our customers through our datacenters.

The most simple way to resolve this issue is using the Office 365 delist portal to remove yourself from the block list.

Please Note: It may take up to 24 hours or results can vary widely before restrictions are removed.

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Answer 2

Your Origin IP Address where you are sending those messages is being blocked by Office 365 Exchange Online.

You will need to fill out the form mentioned in the Status error to delist it, and you can send messages again.

https://sender.office.com

Answer 3

Please ,I am experiencing the issue with a particular user right now

host Domain Name.mail.protection.outlook.com [52.101.68.5]

    SMTP error from remote mail server after RCPT TO:<Domain Name>:

    550 5.7.606 Access denied, banned sending IP [109.70.148.55]. To request removal from this list please visit https://sender.office.com/ and follow the directions. For more information please go to  http://go.microsoft.com/fwlink/?LinkID=526655 AS(1427) [[truncated]

Please can some help .

ive tried this still not working not working Someone please help ....

ttps://sender.office.com/Delist/HandleHIP?__RequestVerificationToken=4z0SWEKGt0Y7BIxrfGq9SxLu9V2tDsn1PYmGjpnnBc4v0c3JDRm9RESUWselE-hLaWwuVLrPDtaQRm3pjg5nw84Vn7c1&Email=olayemi.k%40ibizzapithotel.com&IP=109.70.148.55&Solution=JDJJ4&ChallengeId=cd69