On Fri, Mar 19, 2021 at 04:14:30PM -0500, LoneStarKen wrote:
> # postconf -d | grep smtpd_discard
> smtpd_discard_ehlo_keywords = chunking
That's the only value needed. Whoever built your package decided to
disable the ESMTP CHUNKING extension (aka BDAT). If you want/need
BDAT, you'll need to set that parameter explicitly empty.
> # dnf info postfix
> Version : 3.5.8
> Source : postfix-3.5.8-1.el8.src.rpm
> From repo : baseos
Blame the RedHat/Fedora/CentOS Postfix maintainers.
> What are the ramifications of "smtpd_discard_ehlo_keywords = chunking"
> vs "smtpd_discard_ehlo_keywords = "?
The server does not advertise support for CHUNKING and therefore clients
cannot use the BDAT command (which is defined as part of the CHUNKING
ESMTP extension in RFC3030).
> I'm not sure if a module is needed that isn't installed to
> implement BDAT or there is some other reason the package manager might
> have disabled it.
There may have been some early bugs in the Exim client-side
implementation of BDAT that motivated someone to do this. I am not
aware of any ongoing issues.
--
Viktor.
