Whitelist rDNS

Rhuan

• January 18, 2023 07:44

There is a very large hosting service provider in my country that has several IP blocks on blacklists but unfortunately as they are large and have many customers we need to adapt to this problem that they do not solve so I would like to know if it is possible to do some configuration in exim that would allow all incoming/outgoing emails from an rDNS wildcard, for example: IP 1.2.3.4 -> rDNS = 1-2-3-4.provider.com IP 2.3.4.5 -> rDNS = 2-3-4-5.provider.com Make a whitelist for *.provider.com, I tried to search the forum for a similar solution but unfortunately I didn't find anything. Tks!!

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  andrew.n

  • January 18, 2023 14:24

  As I recall you can only whitelist IPs rather than hostnames :(

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  cPRex Jurassic Moderator

  • January 18, 2023 18:20

  That's correct - there is only IP blocking and whitelisting, as outlined here:

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