Hi, > On Sat, Nov 11, 2023 at 08:16:20PM +0000, Gareth Evans wrote: > > > On 9 Nov 2023, at 13:47, Byung-Hee HWANG <soyeo...@doraji.xyz> wrote: > > > <quote> > > > 220 bendel.debian.org ESMTP Postfix > > > ehlo penguin > > > 250-bendel.debian.org > > > 250-PIPELINING > > > 250-SIZE 30720000 > > > 250-STARTTLS > > > 250-ENHANCEDSTATUSCODES > > > 250-8BITMIME > > > 250 CHUNKING > > > quit > > > 221 2.0.0 Bye > > > </quote> > > > > Hi Byung-Hee, > > > > How did you generate that, assuming it's a response to some command(s)? > > 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 Have a nice day :) Thomas
