• نصب بر روی Ubuntu 16.04

# apt-get install heirloom-mailx

• نصب بر روی Ubuntu 18.04 و Ubuntu 20.04

# wget http://archive.ubuntu.com/ubuntu/pool/universe/s/s-nail/heirloom-mailx_14.8.6-1_all.deb
# apt install ./heirloom-mailx_14.8.6-1_all.deb
# apt-get -f install
# apt-get update
# apt-get -y dist-upgrade
# apt autoremove

• دریافت بسته‌ی heirloom-mailx_14.8.6-1_all.deb