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Odd "RENEGOTIATING" behavior when calling "RCPT TO" ?

I've never seen this before, perhaps someone can throw light on it ?

Postfix 3.3.1

Comments

Re: Odd "RENEGOTIATING" behavior when calling "RCPT TO" ?

By Wietse Venema at 10/11/2018 - 12:15

Laura Smith:
Don't enter commands that start with R into OpenSSL.

Wietse

Re: Odd "RENEGOTIATING" behavior when calling "RCPT TO" ?

By Viktor Dukhovni at 10/11/2018 - 12:51

Lower-case 'r' works by the way. The OpenSSL 's_client' utility,
is diagnostic tool for debugging SSL issues, not a general-purpose
proxy, so it has some extra features beyond what what you would
expect to find in a tool that's just an SSL tunnel.

The 'R' and 'Q' interpretation is also disabled if you use the
"-quiet" option (and don't also use '-no_ign_eof', this added
condition may be a bug that'll be fixed).

Re: Odd "RENEGOTIATING" behavior when calling "RCPT TO" ?

By Laura Smith at 10/11/2018 - 15:50

Great tip Viktor. Thanks !

Re: Odd "RENEGOTIATING" behavior when calling "RCPT TO" ?

By Laura Smith at 10/11/2018 - 12:33

Rats ! ;-)

Well, I guess that makes sense.