Deferred: 451 4.7.1 Please try again later
 

Hey -

Thanks in advance to any help given to this issue I'm having.

I'm administrating a mail relay setup by someone else that is now gone and could use some direction with deferred mail 451 errors, I think the solution is obvious but having a hard time defining it.

I have a mail relay in a dmz running the following:
redhat 8.0
sendmail 8.12.8-5.80
MailCorral 1.1.3
Spamassassan 2.63-1

I'm relaying to our exchanger server (boooo, I'm new here, don't blame me...) and seemingly random emails are deferred. We are relaying via /etc/mail/access, no firewall is running (on the relay), no issues with the aliases. The following is my mc file but I don't think the issue is here (note: we're not using proc mail):


sendmail.mc;

divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for Red Hat Linux')dnl
OSTYPE(`linux')dnl
define(`confDEF_USER_ID',``8:12'')dnl
define(`confTRUSTED_USER', `smmsp')dnl
dnl define(`confAUTO_REBUILD')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST',true)dnl
define(`confDONT_PROBE_INTERFACES',true)dnl
define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl
define(`confAUTH_OPTIONS', `A')dnl
define(`confMAX_MESSAGE_SIZE', `5000000')
define(`_FFR_MILTER',`1')dnl
INPUT_MAIL_FILTER(`filter1',`S=inet:2526@localhost, F=T T=C:5m;S:90s;R:90s;E:5m')dnl
define(`confINPUT_MAIL_FILTERS',`filter1')dnl
define(`confMILTER_LOG_LEVEL', 15)dnl
define(`confTO_IDENT', `0')dnl
FEATURE(`no_default_msa',`dnl')dnl
FEATURE(`smrsh',`/usr/sbin/smrsh')dnl
FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl
FEATURE(`domaintable',`hash -o /etc/mail/domaintable.db')dnl
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
FEATURE(local_procmail,`',`procmail -t -Y -a $h -d $u')dnl
FEATURE(`access_db',`hash -T<TMPF> -o /etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl
FEATURE(`accept_unresolvable_domains')dnl
LOCAL_DOMAIN(`localhost.localdomain')dnl
MASQUERADE_AS(`xxx.xxx.xxx.edu')
FEATURE(masquerade_entire_domain)dnl
MASQUERADE_DOMAIN_FILE(`/etc/mail/masquerade_domains')dnl
define(`confBIND_OPTS', `WorkAroundBrokenAAAA')dnl
MAILER(smtp)dnl
MAILER(procmail)dnl
define(`confSEPARATE_PROC', `True')dnl
define(`confMAX_DAEMON_CHILDREN', `12')dnl