Re: [exim] Keep local_part_suffix in redirect router

[Frank Richter via Exim-users]

Am 08.11.22 um 18:00 schrieb Slavko via Exim-users:

we'd like to allow subaddresses like user+sub@domain to deliver to users’s 
folder sub (if existent) via lmtp. Target system is cyrus-imapd.
We have these routers:

global_aliases:
  driver = redirect
  allow_defer
  allow_fail
  data = ${lookup{$local_part@$domain}dbm{DBM/aliases}}
  local_part_suffix = "+*"
  local_part_suffix_optional
  retry_use_local_part
  no_rewrite

The suffix is in the $local_part_suffix variable and contains
separator already (eg. +tag). I use this:

     dovecot_ualias:
       ...
       domains = +our_domains

       local_part_suffix = +*
       local_part_suffix_optional
       qualify_preserve_domain
       data = ${lookup{$local_part} lsearch{VMAIL_DOM_DIR/$domain_data/aliases} 
\
              {${quote_local_part:$value$local_part_suffix}} }

I have per domain alias file with data without RHS part, thus lookup
returns only local_part, to which is suffix appended.

If your lookup returns qualified addresses, try something as this with
lookup's result (not tested):

     ${sg{$value}{\N(@[^@]+)$\N}{$local_part_suffix\$1}}

Thanks to all of you. As I've a RHS in the lookup, using

global_aliases:
  driver = redirect
  allow_defer
  allow_fail
  data = 
${lookup{$local_part@$domain}dbm{DBM/aliases}{${sg{$value}{\N(@[^@]+)$\N}{$local_part_suffix@\$1}}}
 }
  local_part_suffix = "+*"
  local_part_suffix_optional
  retry_use_local_part
  no_rewrite

and
exim -v -d-all+route+transport -bvfri+t...@hrz.tu-chemnitz.de

--------> global_aliases router <--------
local_part=fri+test domain=hrz.tu-chemnitz.de
stripped suffix +test
calling global_aliases router
rda_interpret (string): 
'${lookup{$local_part@$domain}dbm{/path/aliases}{${sg{$value}{\N(@[^@]+)$\N}{$local_part_suffix@\$1}}}
 }'
LOG: MAIN PANIC
  Tainted string '+test@$1' in expansion
global_aliases router: defer forfri+t...@hrz.tu-chemnitz.de
  message: failed to expand 
"${lookup{$local_part@$domain}dbm{/path/aliases}{${sg{$value}{\N(@[^@]+)$\N}{$local_part_suffix@\$1}}}
 }": Tainted string '+test@$1' in expansion
fri+t...@hrz.tu-chemnitz.de  cannot be resolved at this time: failed to expand 
"${lookup{$local_part@$domain}dbm{/path/aliases}{${sg{$value}{\N(@[^@]+)$\N}{$local_part_suffix@\$1}}}
 }": Tainted string '+test@$1' in expansion

Hm, local_part_suffix is tainted because of the * in local_part_suffix = "+*"

Jeremy: Don't have your global-aliases strip them?

Yeah, but how?

Thanks,
Frank

--
Frank Richter, Chemnitz University of Technology, Germany

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