Hibaelhárítás

Mit tegyünk, ha a leveleket nem kézbesíti az exim4

Egy hálózati hiba során előfordulhat, hogy a kimenő levelek bennragadnak, azaz a kézbesítés meghiúsul. A konfigurációtól függően a bennragadás igen hosszú ideig is eltarthat. Ezt a folyamatot megszakíthatjuk az alábbi parancsok kiadásával. Amely segítségével újra kérhetjük a kézbesítést

exim_tidydb -t 10m /var/spool/exim retry
exim_tidydb -t 10m /var/spool/exim wait-remote_smtp

HELO/EHLO trükkök

https://github.com/Exim/exim/wiki/AclHeloTricks

Kiküldés

Levél küldése kifelé hivatalos tartomány-név nélkül a levél elvetését okozhatja a fogadó szerverek anti-spam szabályai miatt. A internet-szolgáltatód levelező kiszolgálójának használata ajánlott. Ha mégis közvetlenül küldenél kifelé levelet, használj az alaptól eltérő email-címet. Ha az exim4 az MTA programod, ez a /etc/email-addresses fájlban történhet.

Wildcard és egyebek

Forrás itt

This is a quick howto for setting up Exim4 with:
1) several incoming (virtual) domains
2) some local users
3) wildcard catchall accounts to collect the emails not matching the local users

Setup the virtual domains in the dc_other_hostnames variable in /etc/exim4/update-exim4.conf.conf. These are the domains considered local by this installation of Exim4. Any other domains will be routed as remote mail either through the IP defined by dc_smarthost, or direct delivery through DNS lookup of the MX records, or a hubbed_hosts definition file if it exists which overrides the DNS lookups.
Create the local users with adduser
If required, create the local user sending addresses (for the From: header) in /etc/email-addresses (otherwise the local user will be stamped with the mail hostname defined in /etc/mailname)
- #/etc/email-addresses
- user1: user1@domain1.com
- user2: user2@domain2.net
Define the catchall accounts in a new a wildcard aliases file /etc/aliases_wildcards** # /etc/aliases_wildcards
- #*@domain1.com: domain1-catchall-user
- #*@domain2.net: domain1-catchall-user
Create a new router directive to process the wildcard aliases - the first 3 digits of the filename define which order routers are processed by Exim4. This needs to be after the local_user router which is by default 900 so any value higher than 900 will work. I've chosen 999. /etc/exim4/conf.d/router/999_exim4-config_system_aliases_wildcard** # This router handles wildcard aliasing using a /etc/aliases_wildcards file
- # /etc/aliases_wildcards must exist as it is a non-standard file
- system_aliases_wildcards:
- debug_print = "R: system_aliases_wildcards for $local_part@$domain"
- driver = redirect
- domains = +local_domains
- allow_fail
- allow_defer
- data = ${lookup{@$domain}lsearch{/etc/aliases_wildcards}}
- file_transport = address_file
Check the routing works as expected
- exim4 -bt user1@domain1.com
- exim4 -bt notauser@domain1.com
- The first command should show email routing to a local user using the local_user router.
  - R: system_aliases for user1@domain1.com
  - R: userforward for user1@domain1.com
  - R: procmail for user1@domain1.com
  - R: maildrop for user1@domain1.com
  - R: lowuid_aliases for user1@domain1.com (UID 1001)
  - R: local_user for user1@domain1.com
  - user1@domain1.com
  - router = local_user, transport = maildir_home
- The second command should show email routing to the catchall account again using the local_user router:
  - R: system_aliases for notauser@domain1.com
  - R: system_aliases_wildcards for notauser@domain1.com
  - R: system_aliases for domain1-catchall-user@localsystem.com
  - R: userforward for domain1-catchall-user@localsystem.com
  - R: procmail for domain1-catchall-user@localsystem.com
  - R: maildrop for domain1-catchall-user@localsystem.com
  - R: lowuid_aliases for domain1-catchall-user@localsystem.com (UID 1000)
  - R: local_user for domain1-catchall-user@localsystem.com
  - domain1-catchall-user@localsystem.com
  - <-- notauser@domain1.com
  - router = local_user, transport = maildir_home

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