Remove Exim version number

Question

I'm trying to get rid of the version number that you see when you get an email sent from Exim.

Received: from user1 by site.org with local (Exim 4.72)

I'v tried editing smtp_banner in these two files

/etc/exim4/conf.d/main/02_exim4-config_options
/etc/exim4/exim4.conf.template

But deleting the version number from there, then reloading Exim's config doesn't work.

I send my test emails like so:

echo "Message Content" | mail -s "Subject goes here" [email protected] -v

Update 1

comp1:/etc/exim4# ls -l /etc/exim4/
total 96
drwxr-xr-x 9 root root         4096 Jul 30  2010 conf.d
-rw-r--r-- 1 root root        76239 Jan 21 08:24 exim4.conf.template
-rw-r----- 1 root Debian-exim   204 Sep 30  2008 passwd.client
-rw-r--r-- 1 root root         1462 Jan 21 07:39 update-exim4.conf.conf

Answer 1

Open the file /etc/exim.conf and find the key smtp_banner, then change that line in this way :

From

smtp_banner = "${primary_hostname} ESMTP Exim ${version_number} \ 

To

smtp_banner = "${primary_hostname} ESMTP \

Answer 2

smtp_banner modifies the banner displayed to the client upon connection, but it looks like you want to change what's being put in the Received: header.

For that, you'll want to define received_header_text, probably in /etc/exim4/conf.d/main/02_exim4-config_options. The option isn't in the file by default, but per the documentation the default setting is

received_header_text = Received: \
  ${if def:sender_rcvhost {from $sender_rcvhost\n\t}\
  {${if def:sender_ident \
  {from ${quote_local_part:$sender_ident} }}\
  ${if def:sender_helo_name {(helo=$sender_helo_name)\n\t}}}}\
  by $primary_hostname \
  ${if def:received_protocol {with $received_protocol}} \
  ${if def:tls_cipher {($tls_cipher)\n\t}}\
  (Exim $version_number)\n\t\
  ${if def:sender_address \
  {(envelope-from <$sender_address>)\n\t}}\
  id $message_exim_id\
  ${if def:received_for {\n\tfor $received_for}}

So you should be able to just paste the above text into your config, making whatever changes you'd like.

Answer 3

you have to edit /etc/exim4/exim4.conf.template:

$ grep  smtp_banner /etc/exim4/*
/etc/exim4/exim4.conf.template:# smtp_banner = $smtp_active_hostname ESMTP Exim $version_number $tod_full

There do what aleroot suggested.

Answer 4

The post shows the macros that need to be set, but is not clear about how to set them. If you are using a Debian/Ubuntu system you can define them in /etc/exim4/exim.conf.localmacros. If you are using the split configuration, then you should create a symlink to this file with a name like 00_exim-conf-localmacros in /etc/exim4/conf.d/main. Once you have done this you can restart.

Check the configuration in /var/lib/exim/conf.autogenerated to ensure your macros are included.

If you are using other systems, the configuration file may be provided using a different mechanism. The default configuration may be /etc/exim4/exim4.conf. Debian/Ubuntu systems will use this it it exists.

It appears you may need to make a number of configuration changes. On a Debian/Ubuntu system I would suggest you use the split configuration. If you make your changes using the documented mechanism, version updates should not break or loose your configuration changes.