busybox/mailutils
Denys Vlasenko b9f56e82da sendmail: make it possible to pause after connection helper is started
If a non-starttls helper is in use, initial 220 response is processed by us,
not by helper.
Some servers consider us to be a spammer if we don't wait for it.

It is not in protocol, but it is a real-life problem.

The workaround in this patch is a magic envvar, $SMTP_ANTISPAM_DELAY:

...
	-H 'PROG ARGS'	Run connection helper. Examples:
		openssl s_client -quiet -tls1 -starttls smtp -connect smtp.gmail.com:25
		openssl s_client -quiet -tls1 -connect smtp.gmail.com:465
			$SMTP_ANTISPAM_DELAY: seconds to wait after helper connect
...

By using it, people can tweak sendmail behavior even if sendmail invocation
is buried in some scripts.

function                                             old     new   delta
packed_usage                                       30464   30497     +33
sendmail_main                                       1185    1206     +21
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 54/0)               Total: 54 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-09-07 13:16:33 +02:00
..
Config.src *: add INSERTs to *.src files where appropriate 2010-06-08 12:15:11 +02:00
Kbuild.src reformime: do not require \r\n 2011-05-22 03:46:33 +02:00
mail.c build system: -fno-builtin-printf 2015-10-07 22:42:45 +02:00
mail.h makemime: content-type should default to application/octet-stream 2011-11-19 13:55:46 +01:00
makemime.c getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LIST 2016-07-06 21:58:02 +02:00
popmaildir.c getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LIST 2016-07-06 21:58:02 +02:00
reformime.c getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LIST 2016-07-06 21:58:02 +02:00
sendmail.c sendmail: make it possible to pause after connection helper is started 2016-09-07 13:16:33 +02:00