hi,

Please find the config files..

Here is the config

Sendmail

divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
dnl ## define(`confPRIVACY_FLAGS',`authwarnings,novrfy,noexpn,restrictqrun,needmailhelo,needvrfyhelo,restrictqrun')dnl
LOCAL_DOMAIN(`mbox1.aztgrp.net')dnl
# DeliveryMode=queueonly
define(`confDELIVERY_MODE',`background')dnl
dnl ###################################"""""""""# dnl
dnl ###### spamass-milter #####
MAIL_FILTER(`spamassassin',`S=local:/run/spamass-milter/spamass-milter.sock, F=, T=C:15m;S:4m;R:4m;E:10m')dnl

dnl ######
dnl ################  security #####
define(`confCT_FILE', `/etc/mail/trusted.list')dnl
define(`confMAX_MESSAGE_SIZE',24000000)
define(`confSAFE_QUEUE',`true')dnl
dnl ############  connection SPAM ###########
define(`confDOUBLE_BOUNCE_ADDRESS',`it@ooooo.com')
dnl ###### DNSBL####
FEATURE(`dnsbl',`dnsbl.office.itx')dnl
dnl  ######### min connection Regulate flow #########
define(`confMAX_DAEMON_CHILDREN',312)
define(`confMAX_QUEUE_CHILDREN',120)dnl
define(`confMAX_RUNNERS_PER_QUEUE',5)dnl
dnl #define(`MAX_QUEUE_CHILDREN',10)dnl
define(`confMAX_QUEUE_RUN_SIZE',200)dnl
dnl ############################# dnl
FEATURE(`delay_checks')dnl
FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl
FEATURE(`ratecontrol',`nodelay',`terminate',`conncontrol')dnl
define(`confCONNECTION_RATE_THROTTLE',30)dnl
dnl # define(`confCONNECTION_RATE_WINDOW_SIZE',90s)dnl
define(`confMAXRCPTSPERMESSAGE', `15')dnl
define(`confBAD_RCPT_THROTTLE',12)dnl
define(`confTRY_NULL_MX_LIST', `True')dnl
define(`confCW_FILE',`/etc/mail/local-host-names')dnl
define(`confNO_RCPT_ACTION',`add-to-undisclosed')dnl
define(`confRRT_IMPLIES_DSN')dnl
dnl ##
dnl ### milter-limit
define(`confMILTER_MACROS_EOM', `{msg_id}')dnl
dnl ##
dnl ######################dnl
dnl ################  Def RELAY
define(`SMTP_MAILER_FLAGS',`l8')dnl
define(`ESMTP_MAILER_FLAGS',`l8')dnl
define(`SMART_HOST',`sas.intranet.office.itx')
define(`RELAY_MAILER',`RELAY')dnl
dnl #####
define(`confSMTP_LOGIN_MSG',`mbox1.xxxx.net - $b')
define(`confQUEUE_SORT_ORDER',`Time')dnl
define(`confDEF_USER_ID', ``8:12'')dnl
dnl define(`confAUTO_REBUILD')dnl
dnl #define(`confTO_CONNECT',0)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(`STATUS_FILE', `/var/log/mail/statistics')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confTIME_ZONE',`CEST')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confQUEUE_SORT_ORDER',priority)dnl
define(`confTO_QUEUERETURN',`2h')
define(`confTO_QUEUEWARN',`10m')
dnl ####### 03/11/20
define(`confWORK_RECIPIENT_FACTOR', `1000')dnl
define(`confWORK_TIME_FACTOR',6000)dnl
define(`confTO_HOSTSTATUS',`15m')dnl
dnl # define(`confTO_DATAINIT', `6m')dnl
dnl # define(`confTO_DATABLOCK', `35m')dnl
dnl # define(`confTO_DATAFINAL', `35m')dnl
dnl #### Max load average for sending dnl
dnl # ax load average for receiving dnl
define(`confQUEUE_LA',30)
define(`confREFUSE_LA',156)dnl
define(`confDELAY_LA',3)dnl
dnl # define(`confTO_IDENT',0)
dnl #########  Direct go everywhere
dnl # FEATURE(`accept_unresolvable_domains')dnl
dnl # FEATURE(`accept_unqualified_senders')dnl
define(`confDIRECT_SUBMISSION_MODIFIERS', `C')dnl
dnl #
define(`confBIND_OPTS', `-DNSRCH -DEFNAMES +WorkAroundBrokenAAAA')dnl
dnl ##############################
dnl # If you're operating in a DSCP/RFC-4594 environment with QoSdnl
define(`confINET_QOS',`AF33')dnl
dnl ### ne souhaite pas necessairement le cryptage
dnl # define(`confTLS_SRV_OPTIONS', `V')dnl
FEATURE(delay_checks)dnl
FEATURE(`no_default_msa', `dnl')dnl
FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(domaintable)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
FEATURE(`nocanonify',`canonify_hosts')dnl
dnl #### sasl ####
define(`confAUTH_OPTIONS',`A,')
TRUST_AUTH_MECH(`LOGIN PLAIN DIGEST-MD5 CRAM-MD5')dnl
define(`confAUTH_MECHANISMS', `LOGIN PLAIN DIGEST-MD5 CRAM-MD5')dnl
dnl #
dnl ###########################################################################dnl
dnl ###########################################################################dnl
dnl ######################   SSL/ STARTTLS ####################dnl
define(`confCACERT_PATH', `/etc/mail/ssl/ssl1')dnl
define(`confCACERT', `/etc/mail/ssl/ssl1/STAR_xxx_net.ca-bundle')dnl
define(`confSERVER_CERT', `/etc/mail/ssl/ssl1/STAR_xxxx_net.crt')dnl
define(`confSERVER_KEY', `/etc/mail/ssl/ssl1/private.key')dnl
define(`confCLIENT_CERT',`/etc/mail/ssl/ssl1/STAR_xxx_net.crt')dnl
define(`confCLIENT_KEY',`/etc/mail/ssl/ssl1/private.key')dnl
dnl ###########################################################################dnl
dnl
dnl ############  OPENDKIM #################################### 
MAIL_FILTER(`opendkim', `S=inet:8891@127.0.0.1')dnl
define(`confMILTER_MACROS_ENVFROM', `i, {auth_type}, {auth_authen}, {auth_ssf}, {auth_author}, {mail_mailer}, {mail_host}, {mail_addr}')dnl
define(`confMILTER_MACROS_ENVRCPT',`r, v, b, Z, {auth_type}, {greylist}, {auth_ssf}')dnl

define(`confRECEIVED_HEADER',`( _Code originator: MBOX1_901_13_)_$?{auth_type}Abused? contact-us_at ** abuse@azure-telecom.com **')dnl
define(`confMILTER_MACROS_CONNECT', `b,j, _, {daemon_name}, {if_name}, {if_addr}, {client_resolve}')dnl
dnl #### Local lmtp/Dovecot ######

Dovecot

# 2.3.8 (9df20d2db): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.8 (b7b03ba2)
# OS: Linux 4.18.0-305.7.1.el8_4.x86_64 x86_64 CentOS Linux release 8.4.2105 xfs
# Hostname: mbox1.xxx.net
auth_mechanisms = plain login
auth_username_format = %u
debug_log_path = /var/log/dovecot-debug.log
default_vsz_limit = 4 G
info_log_path = /var/log/dovecot-info.log
listen = *
log_path = /var/log/dovecot.log
login_trusted_networks = 172.18.0.0/16 127.0.0.1 ::1
mail_access_groups = dovecot
mail_fsync = always
mail_location = maildir:/var/spool3/mail/%u:LAYOUT=fs
mail_plugins = " quota"
mail_privileged_group = mail
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
mbox_very_dirty_syncs = yes
mbox_write_locks = fcntl
mmap_disable = yes
namespace inbox {
  disabled = no
  ignore_on_failure = no
  inbox = yes
  list = yes
  location =
  mailbox Drafts {
    auto = subscribe
    special_use = \Drafts
  }
  mailbox Junk {
    auto = subscribe
    autoexpunge = 12 weeks
    special_use = \Junk
  }
  mailbox Sent {
    auto = subscribe
    special_use = \Sent
  }
  mailbox Trash {
    auto = no
    autoexpunge = 12 weeks
    special_use = \Trash
  }
  mailbox virtual/All {
    auto = no
    special_use = \All
  }
  prefix =
  subscriptions = yes
  type = private
}
passdb {
  driver = pam
}
plugin {
  quota_grace = 10%%
  quota_max_mail_size = 100M
  quota_rule = *:storage=10000M
  quota_rule2 = Trash:Storage=+100M
  quota_status_nouser = DUNNO
  quota_status_overquota = 552 5.2.2 Mailbox is full
  quota_status_success = DUNNO
  quota_warning = storage=95%% quota-warning 95 %u
  quota_warning2 = storage=80%% quota-warning 80 %u
  sieve = file:~/sieve;active=~/.dovecot.sieve
}
pop3_uidl_format = %v-%u
service auth {
  unix_listener auth-master {
    mode = 0666
  }
}
service dict {
  unix_listener dict {
    mode = 0600
    user = mail
  }
}
service imap-login {
  inet_listener imap {
    port = 0
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
}
service lmtp {
  inet_listener lmtp {
    port = 24
  }
  unix_listener /var/run/lmtp {
    group = mail
    mode = 0660
    user = mail
  }
}
service pop3-login {
  inet_listener pop3 {
    address = *
    port = 110
  }
  inet_listener pop3s {
    port = 995
    ssl = yes
  }
}
service quota-warning {
  executable = script /usr/local/bin/quota-warning.sh
  unix_listener quota-warning {
    user = mail
  }
  user = dovecot
}
service submission {
  process_limit = 250
}
ssl = required
ssl_ca = </etc/mail/ssl/ssl1/STAR_xxxx_net.ca-bundle
ssl_cert = </etc/mail/ssl/ssl1/STAR_xxxx_net.crt
ssl_cipher_list = HIGH:!aNULL:!ADH:!DH:!RC4:!MD5:!RSA
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
userdb {
  driver = passwd
}
verbose_proctitle = yes
protocol lmtp {
  mail_fsync = optimized
  mail_plugins = autocreate quota acl fts fts_solr zlib mail_log notify sieve
  postmaster_address = it@intranet.office.itx
}
protocol lda {
  mail_fsync = optimized
  mail_plugins = " quota sieve quota"
}
protocol imap {
  mail_max_userip_connections = 80
  mail_plugins = " quota quota imap_quota"
  ssl_cert = </etc/mail/ssl/ssl1/STAR_xxx_net.crt
  ssl_key = # hidden, use -P to show it
}
protocol pop3 {
  mail_max_userip_connections = 10
  mail_plugins = " quota"
}
protocol submission {
  mail_max_userip_connections = 10
  mail_plugins = " quota"
}

Am 18.07.2021 um 21:45 schrieb Stephane Magnier:

and sendmail log file says Jul 18 21:39:50 mbox1 sm-msp-queue[3065]: starting daemon (8.15.2): queueing@01:00:00 Jul 18 21:41:15 mbox1 sendmail[3213]: STARTTLS=server, relay=sas.intranet.office.itx [172.18.2.85], version=TLSv1.3, verify=NO, cipher=TLS_AES_256_GCM_SHA384, bits=256/256 Jul 18 21:41:15 mbox1 sendmail[3213]: 16IJfFRE003213: SYSERR(root): buildaddr: unknown mailer unknown: Unknown error -30988 Thanks and regards,

Did you remove the smtp MAILER?

It is not helpful to provide just that part of the configuration you think it tells everything about both server applications.

Alexander