Re: [hylafax-users] Hylafax + Asterisk and External MTA mail2fax configuration issue

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Diego de Fuentes Ceballos wrote:

> Thanks for your reply Lee, here is the correct link:
>
> http://www.julianmenendez.es/documentos/asterisk_hylafax_iaxmodem

Okay, but that posting doesn't have anything to do with MTAs or 
mail-to-fax stuff.  That information comes out in the reader comments 
below, and I would be extremely cautious about expecting the reader 
comments to be particularly good or accurate.

> I also asked that guy about this and he posted a new howto but using 
> Postfix:
>
> http://www.julianmenendez.es/pasarela_email2fax_hylafax_postfix/

There seems to be some misunderstanding on the author's part that 
HylaFAX itself can do what he seems to be regressing to Asterfax and 
that email2fax script to accomplish... which takes HylaFAX out of the 
loop and is effectively a less-capable manner of doing it.

I think that the best way to accomplish what most people want out of a 
mail-to-fax arrangement is to use HylaFAX+'s faxmail (faxmail got an 
overhaul that is available in 5.0.3).  However, if you have a customized 
mail format that you want to use then you may do best to write a faxmail 
replacement in shell or something like I've done for RelayFax here:

 http://hylafax.sourceforge.net/howto/clients/relayfax2sendfax

> And actually the only thing that i want is for my MTA to be able to 
> invoque the faxing utilities when it receives an email addressed to 
> FAXNUMBER@mydomain and send it to FAXNUMBER; it will be the end users' 
> responsibility to type correctly the destination.

Okay.  What MTA are you using?  You'll need to instruct the MTA to send 
all mail destined to just numbers to the mail-to-fax processor.

If you were using sendmail I would recommend that you create a 
fax-specific hostname for mail-to-fax mails... like 
"fax.mrcorp.com.mx".  So the fax mails will get sent to 
FAXNUMBER@xxxxxxxxxxxxxxxxxx  You'll need to work your DNS in order to 
accomplish this, but it makes the sendmail configuration much more 
simple.  Then you just set up a virtual user table (file 
"virtusertable", usually in /etc/mail) with the entry:

 @fax.mrcorp.com.mx mailtofax

Then run "make" to build the virtusertable.db file.  Then create a 
"mailtofax" alias in /etc/aliases that looks something like this:

 mailtofax: "|/usr/local/bin/mailtofax.sh"

Then run newaliases.  If your sendmail is also running smrsh you may 
need to create link /etc/smrsh/mailtofax.sh --> 
/usr/local/bin/mailtofax.sh.  Then restart sendmail.

Then you need to create the file /usr/local/bin/mailtofax.sh.  You can 
do *anything* with it at that point, but I would suggest something like 
this:

#!/bin/sh
cat > /tmp/mailtofax.mail.$$
DESTNUM=`grep -m 1 "^To:" /tmp/mailtofax.mail.$$ | sed 
's/^To:[^0-9]*\([0-9]*\)@.*/\1/'`
if [ -n "$DESTNUM" ]; then
   cat /tmp/mailtofax.mail.$$ | /usr/local/bin/faxmail -d $DESTNUM
fi
exit

Of course, you'll need to make that suit your needs.  Make sure to mark 
the mailtofax.sh script as executable (chmod a+x 
/usr/local/bin/mailtofax.sh).

Lee.

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