This update for fetchmail fixes the following issues:
CVE-2021-39272: Fixed STARTTLS session encryption bypassing (fetchmail-SA-2021-02) (bsc#1190069).
Update to 6.4.22 (bsc#1152964, jsc#SLE-18159, jsc#SLE-17903, jsc#SLE-18059)
This update was imported from the SUSE:SLE-15:Update update project.