0
I've setup exim4 on a ubuntu 12.04 server.
When an email is sent, the current "Received" header has the following content:
Received: from user by example.com with local (Exim 4.76)
(envelope-from <user@example.com>)
id 1VmqiC-0005b0-PG
for user@domain.com; Sat, 30 Nov 2013 15:30:20 00:00
How can I hide the Exim version (4.76) currently being used by the server? Should I be concerned about security if the Exim version is known?
turbogp20
Posted 2013-12-02T11:19:06.157
Reputation: 3
2
You can define you own Received: header using received_header_text option. Looks like Ubuntu is using default one, so you can copy example from docs and just remove $version_number from it.
You should be concerned about security independently from showing version - there was security issues with exim of course. If you have patched system then this is matter of taste. If you hide it then you will be a bit more secure, but debugging of problem with mail from you on remote side will be maybe a bit harder.
dsznajder
Posted 2013-12-02T11:19:06.157
Reputation: 216