Add "List-Unsubscribe" header in Exim config

Community Support Mail
1

Hi,

For anti-spam settings, I’m trying to find out how to add the “List-Unsubscribe” header in Exim config.

I’ve been looking in Internet and in Exim.org site but haven’t found yet a tutorial…

Anyone knows how to do it?

Thanks for any advice.

Best regards,
Roberto Jobet

2

Any idea?

Thanks

Best regards

3

Can’t find anything about it when you google it in combination with exim - so probaly no, you will not get an answer here :slight_smile:.

1 Like
4

Extra headers like ‘List-Unsubscribe’ is not a function of the email server (exim4) but of the sending software. Ex: See php mail function here or PHPMailer library here

1 Like
5

Hi @Lupu,

Thanks for your feedback!

As far as I know ‘List-Unsubscribe’ header should be set on the server.

Before Exim I was using Postfix, and it’s quite easy to setup: see here in " How it works: unsubscribe implementation methods" (https://blog.mailtrap.io/list-unsubscribe-header/)

Furthermore I’ve found an old post about Exim… https://saeedrahhal.wordpress.com/tag/exim/ where the author says to setup the “headers_add” directive in Exim’s config file (but unfortunately Exim has several config files…)

Best regards,
Roberto Jobet

6

You can add headers in Exim, but you shouldn’t use that for unsub links. Wrong tool for the job.

2 Likes
7

I know this is a few years late :sweat_smile: , I’ve just been trying to work out the same thing without much luck online. I’ve found adding a filter at the end of /etc/exim4/system.filter works perfectly, see below:

# Add List-Unsubscribe header if not already present

if "${if def:h_List-Unsubscribe {no}{yes}}" is "yes"
then
  headers add "List-Unsubscribe: <mailto:[email protected]>"
endif

Email went through fine and provides this in the header:

From: John Smith <[email protected]>
To: Ben Dover <[email protected]>
Message-ID: <[email protected]>
Thread-Topic: Testing
Content-type: multipart/alternative;
boundary="B_3835808920_2341711511"
List-Unsubscribe: <mailto:[email protected]>

It may not be how it’s meant to be done, but it works.

8

This adds the header to every email we use in HestiaCP, correct?

How to add that header only for specific email adresses which are used for newsletter & co?