Re: [tor-onions] qmail as MTA to .onion emails

Yes a wrapper for setting "LD_PRELOAD sendmail" if needed since some MUA's might not have a way to specify an env like that when calling out. Or LD_PRELOAD the MUA itself.

qmail-send is the sending side MTA parent daemon, not any sendmail-like (that MUA function is above).

Qmail can use piped progs in startup shell, lots of file descriptors and env vars. LD_PRELOAD thus needs applied in that context to each where applicable.

It should work once figured out.

Some people in onion / i2p have documented various MTA setups there.

Transproxy is big hammer kernel packet filter. LD_PRELOAD is fine tooth userland libs. Bad or good and which, is up to the user to determine.