https://doc.dovecot.org/main/core/config/sieve/extensions/extlists.html
It is apparently not released yet.
Op 4-10-2025 om 23:54 schreef Hadmut Danisch via dovecot:
Hi,
can dovecot sieve query any external database ( berkeley database
file, rest api, whatever) to determine the target folder by sender
address?
Background:
I have to migrate a mailbox from an old ubuntu system running with
mailfilter as a local delivery agent, and dovecot just as an IMAP server.
Since recent ubuntu versions do not have mailfilter anymore (abandoned
for a decade) I need to substitute the mailfilter file with dovecot
sieve.
The old mailfilter script contained something like
if (gdbmopen(".mailfilter.gdbm", "R") == 0)
{
if ( (box=gdbmfetch(tolower($FROM),"D")) ne "" )
to $box
if ( /^From: .*<(.*)>/ )
{
if ( (box=gdbmfetch(tolower($MATCH1),"D")) ne "" )
to $box
}
gdbmclose
}
which allowed to sort mails into mailboxes depending on the sender for
hundreds of sender addresses in a fast end efficient way.
It wouldn't make sense and be too slow to translate this into a sieve
script with a thousand
if header :matches ...
elsif header :matches
...
Is there a way to do this efficently in dovecot's sieve?
regards
Hadmut
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