Hello.
The issue at hand is to attach SRV support (RFC 2782)
to Exim 4.12 through the 'queryprogram' router. Yes, I'm
aware DNS SRV records aren't currently specified for SMTP.
I have the 'syncsolver' program (from
http://www.nongnu.org/ruli/)
which fetches DNS SRV records and issues them to stdout:
$ cat queries.txt
_smtp._tcp.vanrein.org
_smtp._tcp.exim.org
_smtp._tcp.bad.tld
$ ./syncsolver < queries.txt
_smtp._tcp.vanrein.org target=phantom.vanrein.org. port=25 addresses=:217.120.133.159
_smtp._tcp.vanrein.org target=sitemail.everyone.net. port=25 addresses=:216.200.145.35
_smtp._tcp.exim.org empty
_smtp._tcp.bad.tld srv-query-failed: srv_code=7 rcode=3
Now I'd like to write a Perl script or something to parse syncsolver
output and generate the proper string to be issued to Exim's
queryprogram router.
But I can't see a way to:
1. Pass the SRV port parameter to Exim.
2. Make Exim to try every SRV record, until one which succeeds
(like the 2 records for _smtp._tcp.vanrein.org in the example above).
Does anyone know if it's possible to accomplish such task?
Maybe the queryprogram router could be extended a little?
Many thanks,
Everton
