On Sat 11 Nov 2023, at 20:56, Thomas Schmitt <scdbackup@gmx.net> wrote: On Sat 11 Nov 2023, at 20:23, Greg Wooledge <greg@wooledge.org> wrote: >> Telnet to bendel, port 25. Wait for the banner. Type "EHLO your.domain". >> Type "quit" to get out. > > The protocol is named SMTP. > https://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol Oh yes ;) Thanks to Greg and Thomas. Gareth