[stunnel-users] How to run stunnel in client and server mode on the same machine?

I have a task: ecript traffic for my db server(m1) and www/smtp server(m2) I install stunnel on both machines (m1 and m2) then wrote config files m1: ... client = no ... [mssql] accept=1434 connect=1433

m2: ... client=no ... [smtp] accept=465 connect=25

and

m3: some client machine ... client=yes ... [mssql] accept=1433 connect=m1:1434

[smtp] accept=25 connect=m2:465

when I connect to db m3->m1 - ok when I send mail m3->m2 - ok but when I connect to db m2->m1 - failed

how configure m2 stunnel to let him work in client and server mode ?