These might need STARTTLS explicitly disabled in the msmtp config file though

possible email are:
- username@studenti.unitn.it
- username@ex-studenti.unitn.it
- username@alumni.unitn.it
- username@unitn.it

cloeses #577 #572

Erciyes University configuration is updated.

Add nixnet.email domains to domains.csv

the macro for sync all accounts uses 'mbsync -a' command, which
failed to run for users who have moved their ~/.mbsyncrc somewhere
else.

we should use mw -Y instead, which can detect the MBSYNCRC env

Rewrite #520.
Using `read var?'prompt'` is wrong. It is ksh (and zsh) specific.
Using `read -p 'prompt' var` is also wrong. It is bash specific.
Since we cannot assume which sh is implemented,
we should write POSIX-compliant code.

* added anu.edu.au

* found/fixed an out-of-place domain

Add Jagiellonian University student email.

added settings for Czech mail provider seznam.cz and a faculty e-mail for Faculty of Electrical Engineering and Communication, Brno University of Technology

Co-authored-by: Aisha Tammy <aisha@aisha.cc>

Co-authored-by: Luke Smith <luke@lukesmith.xyz>