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Editing: LDA.Exim.txt
Dovecot LDA with Exim ===================== System users ------------ Change the localuser router to use dovecot_delivery transport: ---%<------------------------------------------------------------------------- localuser: driver = accept check_local_user # local_part_suffix = +* : -* # local_part_suffix_optional transport = dovecot_delivery ---%<------------------------------------------------------------------------- 'check_local_user' is required. It makes Exim execute the transport with the user's UID and GID and it also sets HOME environment. Next create a new transport for dovecot-lda: ---%<------------------------------------------------------------------------- dovecot_delivery: driver = pipe # Use /usr/lib/dovecot/dovecot-lda if using Debian's package. # You may or may not want to add -d $local_part@$domain depending on if you need a userdb lookup done. command = /usr/local/libexec/dovecot/dovecot-lda -f $sender_address message_prefix = message_suffix = log_output delivery_date_add envelope_to_add return_path_add #group = mail #mode = 0660 temp_errors = 64 : 69 : 70: 71 : 72 : 73 : 74 : 75 : 78 ---%<------------------------------------------------------------------------- LDA is now running using the local user's UID and GID. The mail is delivered to the location specified by <mail_location> [MailLocation.txt] setting. Note that the above configuration doesn't do any <userdb> [UserDatabase.txt] lookups, so you can't have any per-user configuration. If you want that, see the virtual user setup below. Virtual users ------------- Make sure that 'check_local_user' isn't set in the router. Single UID ---------- Configure the transport to run as the user you want, for example vmail: ---%<------------------------------------------------------------------------- dovecot_virtual_delivery: driver = pipe command = /usr/local/libexec/dovecot/dovecot-lda -d $local_part@$domain -f $sender_address # v1.1+: command = /usr/local/libexec/dovecot/dovecot-lda -d $local_part@$domain -f $sender_address -a $original_local_part@$original_domain message_prefix = message_suffix = delivery_date_add envelope_to_add return_path_add log_output user = vmail temp_errors = 64 : 69 : 70: 71 : 72 : 73 : 74 : 75 : 78 ---%<------------------------------------------------------------------------- You'll also need to have a master authentication socket and give vmail user access to it. See <LDA.txt> for more information. List of temp_errors can be found in '/usr/include/sysexits.h'. Multiple UIDs ------------- If you need multiple uids/gids you'll need to set dovecot-lda setuid root. See <LDA#multipleuids> [LDA.txt] for how to do this securely. You could alternatively set 'user = root', but this requires that you built Exim without root being in FIXED_NEVER_USERS list. Multiple UIDs, without running dovecot-lda as root -------------------------------------------------- In this mode, dovecot-lda won't be querying Dovecot's master socket, instead trusting Exim to setup its execution environment. This means you must set up Exim to get the UID, GID, Home directory from LDAP/SQL/whatever. Here, we're setting them in the router and the transport automatically inherits them. Router configuration -------------------- Insert the following router after your external delivery routers and before your local system delivery routers. This assumes you're using macros set elsewhere to handle your external queries, as they can quickly become unwieldy to manage. Make sure you adjust it to suit your installation first! ---%<------------------------------------------------------------------------- ldap_local_user: debug_print = "R: ldap_local_user for $local_part@$domain" driver = accept domains = +ldap_local_domains condition = LDAP_VIRT_COND router_home_directory = LDAP_VIRT_HOME user = LDAP_VIRT_UID group = LDAP_VIRT_GID #local_part_suffix = +* : -* #local_part_suffix_optional transport = dovecot_lda ---%<------------------------------------------------------------------------- Transport configuration ----------------------- This transport has been tested with Exim 4.69-9 and Dovecot 1:1.2.5-2 (backported) on Debian Lenny. You also have to set ---%<------------------------------------------------------------------------- dovecot_lda: debug_print = "T: dovecot_lda for $local_part@$domain" driver = pipe # Uncomment the following line and comment the one after it if you want dovecot-lda to try # to deliver subaddresses into INBOX.{subaddress}. If you do this, uncomment the # local_part_suffix* lines in the router as well. Make sure you also change the separator # to suit your local setup. #command = /usr/lib/dovecot/dovecot-lda -e -k -m "INBOX|${substr_1:$local_part_suffix}" \ command = /usr/lib/dovecot/dovecot-lda -e -k \ -f "$sender_address" -a "$original_local_part@$original_domain" environment = USER=$local_part@$domain home_directory = /var/mail/home/$domain/$local_part umask = 002 message_prefix = message_suffix = delivery_date_add envelope_to_add return_path_add log_output log_defer_output return_fail_output freeze_exec_fail #temp_errors = * temp_errors = 64 : 69 : 70 : 71 : 72 : 73 : 74 : 75 : 78 ---%<------------------------------------------------------------------------- You need to have <home directory> [VirtualUsers.Home.txt] set to have duplicate database enabled, among other reasons. (This file was created from the wiki on 2019-06-19 12:42)
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