On 2018-03-15 13:58, Matus UHLAR - fantomas wrote: >>> >A. Schulze: >>> >> I like to ask about a documented limitation >>> >> (http://www.postfix.org/CONNECTION_CACHE_README.html#limitations) >>> >> >>> >> "For this reason, the Postfix smtp(8) client always closes the >>> >> connection after completing an attempt to deliver mail over TLS." >>> >>> On 07.03.18 09:07, Wietse Venema wrote: >>> >Indeed. Postfix can migrate the TCP connection from one process to >>> >another, but the TLS library does not support migration of live TLS >>> >state. It supports reuse on new connections only. >>> > >>> >Possible solutions would be: > >>Matus UHLAR - fantomas: >>> a smtp client that able to process multiple mails in a single run is not >>> planned, correct? > > On 15.03.18 09:22, Wietse Venema wrote: >>Wasn't a dedicated per-destination delivery agent one of the possible >>solutions? > > if you mean this one: > >> - For each destination, use dedicated SMTP clients that handle all >> TLS sessions with that destination (no inter-process migration), >> and cache TCP+TLS state in those processes. Unfortunately, that >> does not scale to thousands of destinations. > > ... which does not scale, I was under impression that it requires site > configuration, or keeping multiple clients alive. > > what I meant, is that if SMTP client connecting to destination couldn't > try to deliver multiple (all) mail directed to the destination and then > quit, the only difference would be it could deliver more than just one mail.
I think what Matus is asking here is the RSET implementation in postfix client. For example I have software that send some automated e-mail over night using single SMTP connection (written in perl). After each e-mail it does $smtp->reset(); and than delivers next e-mail using the same connection. Final effect looks like that: disconnect from localhost[127.0.0.1]:51596 ehlo=1 mail=63 rcpt=71 data=63 rset=63 quit=1 commands=262 I believe Matus is asking if that could be implemented in postfix so it connects to remote SMTP server and delivers one e-mail after another issuing RSET after each one and not disconnecting. Karol -- Karol Augustin ka...@augustin.pl http://karolaugustin.pl/ +353 85 775 5312
