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Sending emails fails with the error: failed to expand ACL string ${perl{get_env}{HOME}}

| 00:07:20 17.10.2017

Directadmin developers released BlockCracking 1.8 on October 9th and if you upgraded its version without upgrading /etc/ and /etc/exim.variables.conf you will most likely have an issue with sending emails. Here is a quick way on fix it.

cd /usr/local/directadmin/custombuild
./build update
./build exim_conf

Why is that so?

It's very important to update version of to 23+ and /etc/exim.variables.conf to newer. With older version of and exim.variables.conf sending emails from a server with Directadmin + BlockCracking will fail with the following error:

rejected by non-SMTP ACL: failed to expand ACL string "${perl{get_env}{HOME}}": \
Undefined subroutine &main::get_env called.

For example:

2017-10-12 22:45:02 1e2smL-0005WP-ME F=<> rejected \
by non-SMTP ACL: failed to expand ACL string "${perl{get_env}{HOME}}": Undefined \
subroutine &main::get_env called.

You can find out which version you have with the following command:

grep '#VERSION=' /etc/

it should give the following:


If you have an older version (with lower number) then you should upgrade it with commands shown above (at the beginning of the article).

Have custom exim.conf version?

If for any reason you can't upgrade exim configs due to a customization, then you can do a partial upgrade with the following commands:

wget -O /etc/
chmod 755 /etc/
perl -pi -e 's/keep_environment=.*/keep_environment=PWD:HOME/' /etc/exim.variables.conf.default
perl -pi -e 's/keep_environment=.*/keep_environment=PWD:HOME/' /etc/exim.variables.conf

Control the version of as shown ealier, and run this command:

grep ^keep_environment= /etc/exim.variables.conf /etc/exim.variables.conf.default

Desirable output is as the following:


Restart exim:

service exim restart

That's it.

More information:

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