Problem with Sendmail Mailertable

[Andrea Brancatelli]

Hello everybody, 

Disclaimer: 

I'm not very sure this is the best place to ask, in case feel free to
point me in the right direction. 

Given this, 

I have an old 10.3 machine with sendmail 8.15.2 that's been working ok
for a long time. 

We have a simple mailterable rule that looks like: 

schema31.it    dbmail-lmtpd[10.33.whatever] 

That we use to forward mail in LMTP from sendmail to another machine
where dbmail is working. Everything works as supposed but today after
years of service someone realized the syntax user+mailbox at schema31.it
doesn't work as expected. 

I did a bit of research and debugging and whatever and found out that
when a "+" is involved in the mail address mailertable's lookups doesn't
seem to work and the mail gets sent to local mailer. 

I tried even something fancy like 

.schema31.it dbmail-lmtpd[10.33.whatever] 

Or even the plain all catchall 

.   dbmail-lmtpd[10.33.whatever] 

But nothing works. 

Anybody ever stepped on this and got it working? 

Please, please, please, avoid the "drop sendmail and switch to
<whatever>" replies, if I could I would already done it ;-) 

Thanks a lot.

-- 

Andrea Brancatelli