Question
Is your IP at DigitalOcean one of the thousands that have been blacklisted?
Seems like a whole block of IP addresses at Digital Ocean have been blacklisted at Spamhaus:
https://www.spamhaus.org/sbl/query/SBL368922
A cut and paste of the Removal Procedure is below:
To have record SBL368922 (192.81.208.0/20) removed from the SBL, the Abuse/Security representative of digitalocean.com needs to contact the SBL Team by email to explain how the abuse problem has been terminated (we need to know exactly how the issue has been dealt with and that this abuse problem is fully terminated).
If the abuse problem that caused this listing has been terminated we will normally remove the listing from the SBL without delay.
Botnet hosting going on for weeks, ignoring abuse reports and multiple reminders sent by Spamhaus and 3rd parties:
SBL #: SBL359176
Date: 2017-08-02
To: abuse@digitalocean.com,abuse@serverstack.com
Subject: SBL Notify: IP: 192.81.212.79 added to Spamhaus Block List (SBL)
SBL #: SBL359176
Date: 2017-08-13
To: abuse@digitalocean.com,abuse@serverstack.com
Subject: REMINDER: Heodo botnet controller at 192.81.212.79 [SBL359176]
SBL #: SBL359176
Date: 2017-08-17
To: abuse@digitalocean.com,abuse@serverstack.com
Subject: FINAL REMINDER: Heodo botnet controller at 192.81.212.79 [SBL359176]
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SpamHaus
Hi, all this is to inform you that ( spamhaus.org ) is doing a monopoly in the market. This spam house is blocking the IP and domain for making a profit which is not good for the business. it should work in a good manner. but I really don’t understand why this spam house is doing this. we all have to think about it. if small businesses don’t want to go for the paid email solution for their business that is its choice. spamhaus.org is blocking the IP and domain for no reason. why the small business has to go for the email solution for their business when they can use the own hosting email solution which means. spamhaus.org is doing the wrong thing in the market. why small businesses have to pay the amount if they can send informational emails to their customer from its hosting A/C.we all have to think about it .#Spamhaus monopoly