mutt
Mail Program
A very powerful mail user agent. It supports (among other nice things) highlighting, threading, and PGP. It takes some time to get used to, however. This version is based on NeoMutt, that is it includes many enhancements.
There is no official package available for openSUSE Leap 15.5Distributions
openSUSE Tumbleweed
openSUSE Leap 15.5
openSUSE Leap 15.4
SUSE SLE-15-SP2
SUSE SLE-15-SP1
SUSE SLE-11 SP 4
Unsupported distributions
The following distributions are not officially supported. Use these packages at your own risk.