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| -rw-r--r-- | doc/wiki/LDA.Sendmail.txt | 105 |
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diff --git a/doc/wiki/LDA.Sendmail.txt b/doc/wiki/LDA.Sendmail.txt new file mode 100644 index 0000000..b14e4f0 --- /dev/null +++ b/doc/wiki/LDA.Sendmail.txt @@ -0,0 +1,105 @@ +Dovecot LDA with Sendmail +========================= + +The following describes how to configure Sendmail to use 'dovecot-lda' where +'root' permission is not granted and Dovecot runs under a single user ID. It +may need some adjustment for more typical setups. Other assumptions are that +Sendmail is configured for virtual hosting and that local-system mail delivery +is not handled by 'dovecot-lda'. + +Allowing that 'sendmail.mc' has 'MAILER(procmail)dnl' included, edit +'sendmail.cf' adding these lines after the 'Mprocmail' definition: + +---%<------------------------------------------------------------------------- +######################*****############## +### DOVECOT Mailer specification ### +##################*****################## +Mdovecot, P=/usr/local/libexec/dovecot/dovecot-lda, F=DFMPhnu9, + S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP/HdrFromSMTP, + T=DNS/RFC822/X-Unix, + A=/usr/local/libexec/dovecot/dovecot-lda -d $u +---%<------------------------------------------------------------------------- + +If you're using 'sendmail.mc' then put the lines above into a new file +'/usr/share/sendmail-cf/mailer/dovecot.m4' and put 'MAILER(dovecot)' into your +'sendmail.mc' + +=================================== + +Another method of doing the above is by editing your 'hostname.mc' with the +following three lines: + +---%<------------------------------------------------------------------------- +FEATURE(`local_procmail', +`/usr/local/libexec/dovecot/dovecot-lda',`/usr/local/libexec/dovecot/dovecot-lda +-d $u') +MODIFY_MAILER_FLAGS(`LOCAL', `-f') +MAILER(procmail) +---%<------------------------------------------------------------------------- + +After editing 'hostname.mc' with the above, be sure to remake your +'hostname.cf' file. This is confirmed to work with: + + * dovecot-1.0.7 + * FreeBSD 6.3-RELEASE-p3 i386 + * sendmail Version 8.14.2 + * Compiled with: DNSMAP LOG MAP_REGEX MATCHGECOS MILTER MIME7TO8 MIME8TO7 + NAMED_BIND NETINET NETINET6 NETUNIX NEWDB NIS PIPELINING SASLv2 SCANF + STARTTLS TCPWRAPPERS USERDB XDEBUG + +=================================== + +If 'sendmail' runs under a different non-'root' UID via + + * 'define(`confRUN_AS_USER', `sendmail')dnl' + +in 'sendmail.mc', then the /env_put(t_strconcat("RESTRICT_/ lines in +'deliver.c' must be commented-out. + +Now add a + +---%<------------------------------------------------------------------------- +virtualdomain.example.com vmail:vmail +---%<------------------------------------------------------------------------- + +line for each virtual domain to 'mailertable.cf' and run 'makemap hash +mailertable.db < mailertable.cf'. The 'dovecot' (or some other random text) +after the colon character is required, else 'sendmail' will fail to pass +command arguments to 'dovecot-lda' correctly. Make sure all the virtual +domains are in the 'virtuserdomains' file. + +=========================================== + +(Fedora 14: dovecot 2.0.8 & sendmail 8.14.4) + +Summing up all previous experience, one may keep all virtual user accounts +under one system account. + +The sendmail's "U=" mailer option with changing the owner of lda (to "keeper" +here for instance): + +---%<------------------------------------------------------------------------- +-rwxr-xr-x. 1 keeper mail 14536 Dec 7 16:43 /usr/libexec/dovecot/dovecot-lda +---%<------------------------------------------------------------------------- + +allows to run virtual users under one system account without applying SUID. + +Sendmail can pass a user account to LDA with or without the domain. Passing a +user name without the domain can be achievedwith S=/R= rewriting rules of the +local mailer. Finally, into '/usr/share/sendmail-cf/mailer/dovecot.m4' goes the +block of lines: + +---%<------------------------------------------------------------------------- +Mdovecot, P=/usr/libexec/dovecot/dovecot-lda, + F=l59DFMPhnu, + S=EnvFromL/HdrFromL, R=EnvToL/HdrToL, + M=51200000, + U=keeper:mail, + T=DNS/RFC822/X-Unix, + A=/usr/libexec/dovecot/dovecot-lda -d $u +---%<------------------------------------------------------------------------- + +dovecot.m4 [http://sites.google.com/site/mclroy/dovecot/dovecot-m4] can be a +bit more complex. + +(This file was created from the wiki on 2019-06-19 12:42) |