$ ./check.sh
== Mail list (newest first) ==
2026-09-09 07:05 | Carol                          | Re: Meeting notes
2026-09-07 20:45 | billing@example.com            | Invoice 1042
2026-09-05 08:00 | Renée Dupont                   | Café menu for next week
2026-09-03 14:30 | Bob Builder                    | Lunch on Friday?
2026-09-01 09:15 | Alice Example                  | Welcome to the team
== Checksums before run ==
a181c396f2a8bad2df8fb8365decf5732a1f8f9304ec4d44ac7fe7f6b32d7837  sample_mail/msg1.eml
f06e2d3722ce987bd1b775449a12aa24edc77ecdb77cded45b3c78e42f731797  sample_mail/msg2.eml
554e3364dba5320c2741d8c04256c4bb64fcc153a039871ec103b3aef43dada0  sample_mail/msg3.eml
3ab31f502c0f214d1f5db66a7a6c36d89e2843942733af4fa39b0387a32c57f1  sample_mail/msg4.eml
6672c4397aa7d7f05a662cc9521951744705cf3ca392603367955801accf39d5  sample_mail/msg5.eml
== Compare before/after ==
IDENTICAL: contents and file list unchanged
