Two questions regarding header display

[raf]

On Sun, Jun 05, 2022 at 12:06:52AM -0400, Jason Franklin <jason at oneway.dev> wrote:

> Greetings:
> 
> I have two questions regarding header display...
> 
> First, can the pager display header names in bold if the terminal
> supports it?
> 
> Second some senders have weird capitalization of headers. Is it possible
> to display some canonical representation of any given standard header?
> 
> To clarify, if the header is sent as "reply-to", I would like to always
> see "Reply-To" in the pager.
> 
> Thanks!
> 
> -- 
> Jason

Hi, I don't know about the first part, but the second part
could be done if procmail or similar is used for local
delivery, and it passes incoming messages through a filter
to "correct" the headers to your liking. But it might
be a hassle if you aren't already using procmail.

~/.procmailrc:

  :0 fw
  | /home/me/bin/fix-mail-headers-filter

/home/me/bin/fix-mail-headers-filter:

  #!/usr/bin/env perl
  use warnings;
  use strict;
  # Modify headers if needed (e.g. "reply-to:" to "Reply-To:")
  while (<>)
  {
    # Skip to the following trivial loop after headers
    print, last if /^$/;
    # Replace lowercase at start of word before colon with uppercase
    s/^([^:]*)\b([a-z])/$1\U$2/ while /^[^:]*\b[a-z]/;
    print;
  }
  # Jut print the rest unchanged
  print while (<>);

The above was barely tested. Don't use it without testing it on
lots of existing mail (one message at a time - see formail(1))
until you are sure that it works. And note that it doesn't
convert any uppercase to lowercase, only the other way around.

cheers,
raf