I do nearly all my mails with neomutt. So, I naturally edit mails with
vim (neovim to be precise). These settings add a couple of autocompletes
for very common mail-phrases. Furthermore I restrict the line-length of
my mails to 78 chars per line, since this is the recommended line-length
according to RFC-5322.
Reference: https://datatracker.ietf.org/doc/html/rfc5322#section-2.1.1
