Jukka Marin writes:
> Mail transfer problems SOLVED:
> 
> I had MTU of 296 bytes on the PPP link on my router machine.  When I changed
> it to 576, things started working (it seems).  I heard that this is the
> minimum length specified for IP packets.
> 
> The reason I was setting MTU so small was to speed up interactive connections
> while there's a file transfer in progress.
> 
> Why do we have MTU of 296 bytes for SLIP, then? :-o
> 
> Thanks to all who responded.

Just a note: there is nothing in IP that says that you can't have an
MTU of 296 if you want it. It is probably a flawed implementation at
the other end that is causing the trouble. You should find out what
sort of stack they are running and complain.

Perry