RT 1.0.7 is not updating tickets

I’m running RT 1.0.7 and the messages are not being recorded anymore.

It is generating the “headers” but not the content (header “Sat, Nov 10
2001 20:01:24 Mail sent by abuse@wecke.com” is recorded at the ticket,
but the message content - body - is missing…)

The only change I made was upgrading to Sendmail 8.12.1 (from 8.11.6). I
made a rollback but the problem persists, so I don’t think the Sendmail is
causing this problem…

Any ideas?