I'm using exim4-daemon-heavy.
$ apt list --installed | grep exim4
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
exim4-base/mantic-updates,mantic-security,now 4.96-17ubuntu2.2 amd64 [installed,automatic] exim4-config/mantic-updates,mantic-security,now 4.96-17ubuntu2.2 all [installed,automatic] exim4-daemon-heavy/mantic-updates,mantic-security,now 4.96-17ubuntu2.2 amd64 [installed,automatic] exim4/mantic-updates,mantic-security,now 4.96-17ubuntu2.2 all [installed]
I'm using exim4-daemon-heavy.
$ apt list --installed | grep exim4
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
exim4-base/ mantic- updates, mantic- security, now 4.96-17ubuntu2.2 amd64 [installed, automatic] mantic- updates, mantic- security, now 4.96-17ubuntu2.2 all [installed, automatic] heavy/mantic- updates, mantic- security, now 4.96-17ubuntu2.2 amd64 [installed, automatic] updates, mantic- security, now 4.96-17ubuntu2.2 all [installed]
exim4-config/
exim4-daemon-
exim4/mantic-