Hi Wietse, Thank you for the response. Those entries don't seem to exist in my main.cf or master.cf.
I grepped (case insensitive) main.cf for ehlo, keywords, and discard and none of those words exist. The master.cf has a discard in the section "-o syslog_name=postfix/$service_name" though it isn't the phrase you mentioned. I also note that the file timestamp is today (the date I ran the update). The contents of master.cf is below: smtp inet n - n - - smtpd -o smtpd_sasl_auth_enable=no submission inet n - n - - smtpd -o syslog_name=postfix/submission -o smtpd_etrn_restrictions=reject -o smtpd_tls_security_level=encrypt -o smtpd_tls_auth_only=yes -o smtpd_client_restrictions=permit_mynetworks,permit_sasl_authenticated,reject -o smtpd_helo_restrictions=permit_mynetworks,permit -o milter_macro_daemon_name=ORIGINATING -o smtpd_sasl_type=dovecot -o smtpd_sasl_path=private/auth smtps inet n - n - - smtpd -o syslog_name=postfix/smtps -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_relay_restrictions=permit_mynetworks,permit_sasl_authenticated,reject -o milter_macro_daemon_name=ORIGINATING -o smtpd_sasl_type=dovecot -o smtpd_sasl_path=private/auth pickup unix n - n 60 1 pickup cleanup unix n - n - 0 cleanup qmgr unix n - n 300 1 qmgr tlsmgr unix - - n 1000? 1 tlsmgr rewrite unix - - n - - trivial-rewrite bounce unix - - n - 0 bounce defer unix - - n - 0 bounce trace unix - - n - 0 bounce verify unix - - n - 1 verify flush unix n - n 1000? 0 flush proxymap unix - - n - - proxymap proxywrite unix - - n - 1 proxymap smtp unix - - n - - smtp relay unix - - n - - smtp -o syslog_name=postfix/$service_name showq unix n - n - - showq error unix - - n - - error retry unix - - n - - error discard unix - - n - - discard local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - n - - lmtp anvil unix - - n - 1 anvil scache unix - - n - 1 scache dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/deliver -f ${sender} -d ${recipient} policyd-spf unix - n n - 0 spawn user=policyd-spf argv=/usr/libexec/postfix/policyd-spf postlog unix-dgram n - n - 1 postlogd Thanks again for your help! Ken > On Mar 19, 2021, at 1:01 PM, Wietse Venema <wie...@porcupine.org> wrote: > > LoneStarKen: >> After updating from postfix.x86_64 2:3.3.1-12.el to postfix.x86_64 >> 2:3.5.8-1.el8 I'm getting frequent log entries >> >> Mar 19 10:51:58 mail postfix/smtpd[XXXXXX]: discarding EHLO keywords: >> CHUNKING > > You have one or both of > > smtpd_discard_ehlo_keyword_address_maps > smtpd_discard_ehlo_keywords > > in main.cf or master.cf. > > Wietse