Log Message:
postfix*: update to 3.8.4

20230815

	Bugfix (bug introduced: 20140218): when opportunistic TLS fails
	during or after the handshake, don't require that a probe
	message spent a minimum time-in-queue before falling back to
	plaintext. Problem reported by Serg. File: smtp/smtp.h.

20230819

	Bugfix (defect introduced: 19980207): the valid_hostname()
	check in the Postfix DNS client library was blocking unusual
	but legitimate wildcard names (*.name) in some DNS lookup
	results and lookup requests. Examples:

            name          class/type value
            *.one.example   IN CNAME *.other.example
            *.other.example IN A     10.0.0.1
            *.other.example IN TLSA  ..certificate info...

	Such syntax is blesed in RFC 1034 section 4.3.3.

	This problem was reported first in the context of TLSA
	record lookups. Files: util/valid_hostname.[hc],
	dns/dns_lookup.c.

20230929

	Bugfix (defect introduced Postfix 2.5, 20080104): the Postfix
	SMTP server was waiting for a client command instead of
	replying immediately, after a client certificate verification
	error in TLS wrappermode. Reported by Andreas Kinzler. File:
	smtpd/smtpd.c.

20231006

	Usability: the Postfix SMTP server now attempts to log the
	SASL username after authentication failure. In Postfix
	logging, this appends ", sasl_username=xxx" after the reason
	for SASL authentication failure. The logging replaces an
	unavailable reason with "(reason unavailable)", and replaces
	an unavailable sasl_username with "(unavailable)". Based
	on code by Jozsef Kadlecsik. Files: xsasl/xsasl_server.c,
	xsasl/xsasl_cyrus_server.c, smtpd/smtpd_sasl_glue.c.

20231026

	Bugfix (defect introduced: Postfix 2.11): in forward_path,
	the expression ${recipient_delimiter} would expand to an
	empty string when a recipient address had no recipient
	delimiter. Fixed by restoring Postfix 2.10 behavior to use
	a configured recipient delimiter value. Reported by Tod
	A. Sandman. Files: proto/postconf.proto, local/local_expand.c.

20231221

	Security: with "smtpd_forbid_bare_newline = yes" (default
	"no" for Postfix < 3.9), reply with "Error: bare <LF>
	received" and disconnect when an SMTP client sends a line
	ending in <LF>, violating the RFC 5321 requirement that
	lines must end in <CR><LF>. This prevents SMTP smuggling
	attacks that target a recipient at a Postfix server. For
	backwards compatibility, local clients are excluded by
	default with "smtpd_forbid_bare_newline_exclusions =
	$mynetworks". Files: mantools/postlink, proto/postconf.proto,
	global/mail_params.h, global/smtp_stream.c, global/smtp_stream.h,
	smtpd/smtpd.c.