[Eisfair] E1: Geschwindigkeitsprobleme beim Mailempfang

[Stefan Heidrich]

Hallo Jürgen, hallo NG,

wie bekannt, setze ich einen Eis1 als Mailrelais in der Firma ein. In den 
letzten Tagen habe ich zwei Beschwerden bekommen, dass es Probleme gibt uns 
E-Mails zu schicken und das dabei, insbesondere Postfix-Server, einen 
Timeout in der SMTP-Kommunikation mit uns gemeldet wird.

Ich habe dann selbst getestet und folgendes festgestellt:
Öffne ich intern eine Telnetverbindung über Port 25 zum Mailrelais, so 
antwortet der Server SOFORT mit einem 220.
Mache ich das von irgendwo extern, dann steht die TCP-Kommunikation sofort, 
aber der Server antwortet ca. erst 30 Sekunden später mit einem 220.

Ich habe dann gesucht und habe anschließend
SMTP_IDENT_CALLBACKS= von 'yes' auf 'no'
geändert, da dort laut Doku eine Geschwindigkeitsbremse sitzen kann.
Mit dieser Einstellung antwortet das Mailrelais nun intern wie gehabt SOFORT 
mit 220, von extern nach 10 Sekunden.

Was mache ich falsch oder woran kann es liegen, dass das Mailrelais nicht 
(wie früher?) auch von extern sofort antwortet?

Viele Grüße
Stefan

mail # cat /etc/config.d/mail
START_MAIL='yes'
START_POP3='no'
START_IMAP='yes'
POP3IMAP_CREATE_MBX='no'
POP3IMAP_TRANSPORT='default'
POP3IMAP_IDENT_CALLBACKS='yes'
MAIL_USER_USE_MAILONLY_PASSWORDS='no'
MAIL_USER_N='1'
MAIL_USER_1_ACTIVE='yes'
MAIL_USER_1_USER='user1'
MAIL_USER_1_PASS=''
IMAP_SHARED_PUBLIC_USERGROUP=''
IMAP_SHARED_FOLDER_N='0'
IMAP_SHARED_FOLDER_1_ACTIVE='no'
IMAP_SHARED_FOLDER_1_NAME='Family-News'
IMAP_SHARED_FOLDER_1_USERGROUP=''
IMAP_PUBLIC_FOLDER_N='0'
IMAP_PUBLIC_FOLDER_1_ACTIVE='no'
IMAP_PUBLIC_FOLDER_1_NAME='Announcements'
IMAP_PUBLIC_FOLDER_1_USERGROUP=''
START_FETCHMAIL='no'
FETCHMAIL_PROTOCOL='pop3'
FETCHMAIL_LIMIT=''
FETCHMAIL_WARNINGS='86400'
FETCHMAIL_DAEMON='1800'
FETCHMAIL_TIMEOUT='90'
FETCHMAIL_N='0'
#alle anderen Fetchmail-Vatiablen sind damit nicht mehr nötig

START_SMTP='yes'
SMTP_QUALIFY_DOMAIN='hauptdomain.net'
SMTP_HOSTNAME='mail.hauptdomain.net'
SMTP_QUEUE_INTERVAL='30'
SMTP_QUEUE_OUTBOUND_MAIL='no'
SMTP_QUEUE_ACCEPT_PER_CONNECTION='500'
SMTP_LISTEN_PORT='25'
SMTP_MAIL_TO_UNKNOWN_USERS='forward'
SMTP_ALLOW_EXIM_FILTERS='yes'
SMTP_CHECK_RECIPIENTS=''
SMTP_CHECK_SPOOL_SPACE=''
SMTP_CHECK_SPOOL_INODES=''
SMTP_LIMIT=''
SMTP_REMOVE_RECEIPT_REQUEST='no'
SMTP_SERVER_TRANSPORT='default'
SMTP_IDENT_CALLBACKS='no'
SMTP_SERVER_TLS_ADVERTISE_HOSTS=''
SMTP_SERVER_TLS_VERIFY_HOSTS=''
SMTP_SERVER_TLS_TRY_VERIFY_HOSTS=''
SMTP_SERVER_SSMTP='no'
SMTP_SERVER_SSMTP_LISTEN_PORT='ssmtp'
SMTP_LOCAL_DOMAIN_N='3'
SMTP_LOCAL_DOMAIN_1='@'
SMTP_LOCAL_DOMAIN_2='localhost'
SMTP_LOCAL_DOMAIN_3='hauptdomain.net'
SMTP_RELAY_TO_DOMAIN_N='10'
SMTP_RELAY_TO_DOMAIN_1='domain1'
SMTP_RELAY_TO_DOMAIN_2='domain2'
SMTP_RELAY_TO_DOMAIN_3='domain3'
SMTP_RELAY_TO_DOMAIN_4='domain4'
SMTP_RELAY_TO_DOMAIN_5='domain5'
SMTP_RELAY_TO_DOMAIN_6='domain6'
SMTP_RELAY_TO_DOMAIN_7='domain7'
SMTP_RELAY_TO_DOMAIN_8='domain8'
SMTP_RELAY_TO_DOMAIN_9='domain9'
SMTP_RELAY_TO_DOMAIN_10='domaina'
SMTP_RELAY_FROM_HOST_N='13'
SMTP_RELAY_FROM_HOST_1='127.0.0.1'
SMTP_RELAY_FROM_HOST_2='192.168.3.90'
SMTP_RELAY_FROM_HOST_3='192.168.3.102'
SMTP_RELAY_FROM_HOST_4='192.168.132.30'
SMTP_RELAY_FROM_HOST_5='192.168.16.96'
SMTP_RELAY_FROM_HOST_6='192.168.3.112'
SMTP_RELAY_FROM_HOST_7='192.168.3.0/24'
SMTP_RELAY_FROM_HOST_8='192.168.4.0/22'
SMTP_RELAY_FROM_HOST_9='192.168.143.0/24'
SMTP_RELAY_FROM_HOST_10='192.168.32.101'
SMTP_RELAY_FROM_HOST_11='192.168.32.178'
SMTP_RELAY_FROM_HOST_12='192.168.16.66'
SMTP_RELAY_FROM_HOST_13='192.168.16.68'
SMTP_AUTH_TYPE='none'
SMTP_AUTH_USER=''
SMTP_AUTH_PASS=''
SMTP_SMARTHOST_ONE_FOR_ALL='no'
SMTP_SMARTHOST_DOMAINS='domaina:domain8:domain1:domain2:domain3:domain4:domain5:domain6:domain7:domain9'
SMTP_SMARTHOST_ROUTE_TYPE='domain'
SMTP_SMARTHOST_N='1'
SMTP_SMARTHOST_1_HOST='192.168.3.90'
SMTP_SMARTHOST_1_AUTH_TYPE='none'
SMTP_SMARTHOST_1_ADDR=''
SMTP_SMARTHOST_1_DOMAIN='*'
SMTP_SMARTHOST_1_USER=''
SMTP_SMARTHOST_1_PASS=''
SMTP_SMARTHOST_1_FORCE_AUTH='no'
SMTP_SMARTHOST_1_FORCE_TLS='no'
SMTP_SMARTHOST_1_PORT=''
SMTP_UPDATE_IGNORE_HOSTS='no'
SMTP_UPDATE_IGNORE_HOSTS_CRON_SCHEDULE='5 1 * * 0'
SMTP_ALIASES_N='1'
SMTP_ALIASES_1_DOMAIN=''
SMTP_ALIASES_1_ALIAS_N='1'
SMTP_ALIASES_1_ALIAS_1='root: postm'
SMTP_OUTGOING_ADDRESSES_N='0'
SMTP_OUTGOING_ADDRESSES_1='fm:    frank at domain.de'
SMTP_HEADER_REWRITE_N='0'
SMTP_HEADER_REWRITE_1_SOURCE='*@home.lan'
SMTP_HEADER_REWRITE_1_DESTINATION='valid at domain.de'
SMTP_HEADER_REWRITE_1_FLAGS='sF'
SMTP_LIST_DOMAIN='home.lan'
SMTP_LIST_ERRORS='frank at home.lan'
SMTP_LIST_N='0'
SMTP_LIST_1_ACTIVE='yes'
SMTP_LIST_1_NAME='eisfair'
SMTP_LIST_1_USER_N='2'
SMTP_LIST_1_USER_1='frank at home.lan'
SMTP_LIST_1_USER_2='tom at home.lan'
SMTP_LIST_2_ACTIVE='yes'
SMTP_LIST_2_NAME='fli4l'
SMTP_LIST_2_USER_N='2'
SMTP_LIST_2_USER_1='frank at home.lan'
SMTP_LIST_2_USER_2='joe at home.lan'
START_EXISCAN='yes'
EXISCAN_ACTION_ON_FAILURE='pass'
EXISCAN_CRYPT_SALT='0123456789'
EXISCAN_DEMIME_ENABLED='yes'
EXISCAN_DEMIME_ACTION='pass'
EXISCAN_AV_ENABLED='no'
EXISCAN_AV_ACTION='reject'
EXISCAN_AV_SUBJECT_TAG=''
EXISCAN_AV_SCANNER='cmdline'
EXISCAN_AV_PATH='/usr/local/bin/sweep'
EXISCAN_AV_OPTIONS='-all -archive -tnef -ss %s'
EXISCAN_AV_TRIGGER='found in'
EXISCAN_AV_DESCRIPTION="'(.*)'"
EXISCAN_AV_SOCKET='/var/run/sophie'
EXISCAN_AV_SKIP_AUTHENTICATED='no'
EXISCAN_EXTENSION_ENABLED='no'
EXISCAN_EXTENSION_ACTION='reject'
EXISCAN_EXTENSION_DATA='exe:com:vbs'
EXISCAN_REGEX_ENABLED='no'
EXISCAN_REGEX_ACTION='reject'
EXISCAN_REGEX_DATA='[Mm]ortage : make money'
EXISCAN_SPAMD_ENABLED='yes'
EXISCAN_SPAMD_ACTION='reject'
EXISCAN_SPAMD_HEADER_STYLE='full'
EXISCAN_SPAMD_SUBJECT_TAG='*SPAM*'
EXISCAN_SPAMD_THRESHOLD='5.0'
EXISCAN_SPAMD_ADDRESS='127.0.0.1 783'
EXISCAN_SPAMD_LIMIT='100k'
EXISCAN_SPAMD_SKIP_AUTHENTICATED='no'
MAIL_CERTS_WARNING='no'
MAIL_CERTS_WARNING_SUBJECT='TLS certificates warning'
MAIL_CERTS_WARNING_CRON_SCHEDULE='3 1 1,16 * *'
MAIL_STATISTICS_INFOMAIL='yes'
MAIL_STATISTICS_INFOMAIL_SUBJECT='Mail server statistics'
MAIL_STATISTICS_INFOMAIL_CRON_SCHEDULE='58 23 * * *'
MAIL_STATISTICS_INFOMAIL_OPTIONS='-h0 -nr -nt -ne'
MAIL_LOG_COUNT='31'
MAIL_LOG_INTERVAL='daily'