> On the 2 servers with the version 3.5 and 4.2 yum installed about 90
> updates. In the version 4.5 machine there were about 30 updates.
>
>
Correct. I had also some 90 updates (wow.. where how what? and all just
kept working) ...
I believe I am using 3.5 also.
> Unfortunetely, on the 2 old servers the response time of Sendmail now is
> awfully slow. It takes about 1 minute to get the SMTP greeting message on
> port 25. On the v 4.5 server it only takes one second.
>
> The other services (ftp, ssh etc.) are very fast on al three servers.
>
> I have no idea what it could be...
>
> Can anybody please help ?!?
>
My SMTP greeting message directly appears when trying it remote. No
problem on 3.5 after all updates.