archivemail screwed up (some of) my backups

[steve <dlist@bluewin.ch>]

Hi there,

This is my first post on this mailinglist, so I hope to find the right
tone pretty quickly. If not, please correct me gently  ;-)

I'm using archivemail to archive my messages on a Jessie box up to date.
Recently I needed to find an old message so I tried to gunzip the
mail_archive.gz file and I got this answer:

gzip: mail_archive.gz: invalid compressed data--crc error

I tried the same thing on other archives and the result is that more or
less one third were corrupted. I searched the Net for a solution, but
since the error is a rather general one, I failed to find something
really useful.

Anyone here with a brilliant idea? Or should I buy a couple of
handkerchiefs and start a period of mourning for my lost messages?

Thank you.

Best,
Steve