Re: [hylafax-users] E-mail to fax gateway for Hylafax?

[<ignace.suy@dutchtone.nl>]

Indeed!-- and this page is where i got the fuel for developing this gateway.
The big diffference is, that Lee used the body and the subject of the email
for parsing sendfax information, something i did not wanted to.

The following recipe leads to a faxgateway with this functionality:
Send an email to your faxgateway-user faxgateway@yourserver.com that
includes the faxnumber you want to send the fax to - this way:
faxgateway+0031.23.456.7890@yourserver . The plus is a separation-mark, the
faxnumber can include dots but no other separation marks. The cc field of
your email is not used, the subject field will appear on the fax as a
special subject line. The body of your email must hold the text for the fax.
This will result in the following fax:

           --------- Header ------------------
           To:     <faxnumber from the emailaddress>
           From:   <the original sender of the email as email address>
           Subject:<the subjectline from the email>
           Date:   <the date and time of the faxprocessing>

           <the body contents of the email>
           -------- trailer --------------------


Recipe:
1. create a special user on your hylafax server, like "faxgateway".
2. create a .procmailrc containing the following rules:
-<snip>
$SED="wherever sed is"
$FAXMAIL="wherever faxmail is"
$SENDFAX="wherever sendfax is"

# find out who send the mail:
:0
* ^From:\/.*
{
   FROM = "$MATCH"
}

# now send the mail if a faxnumber can be found in the address
# sed strips the unwanted emailaddress from the To line
# faxmail processes the email to a nice faxformat(ting)
# sendmail processes the fax and returns a confirmation
:0
* ^To:.*faxgateway\+\/[0-9.]+(@)
* MATCH ?? ^^\/.*[^@]
| cat - |                                                \
  $SED 's/\(^To: \)\(faxgateway+\)\([0-9.]*\)@.*$/\1\3/I' |  \
  $FAXMAIL |                                           \
  $SENDFAX -n -f "$FROM" -D -d $MATCH
-<end of snip>

3. send email like: faxgateway+123.456789@yourserver.domain

There is no security, so anyone around the net can use it, provided they
know the address and syntax. It is easy to incorporate a check on trusted
sender-adresses, and/or incorporate a password, and/or limit the faxnr to
national numbers only, but i do not want to implement that unless i see it
is being misused.

regards, Ignace

> -----Original Message-----
> From:	Nick Rout [SMTP:nick@taxlawyer.co.nz]
> Sent:	donderdag 19 oktober 2000 3:55
> To:	ignace.suy@dutchtone.nl; hylafax-users@hylafax.org
> Subject:	Re: [hylafax-users] E-mail to fax gateway for Hylafax?
> 
> The special mail address to send the faxes to is similar to this approach:
> 
> http://www.hylafax.org/howto/clients/RelayFax.html
> 
> 
> ----- Original Message -----
> From: <ignace.suy@dutchtone.nl>
> To: <hylafax-users@hylafax.org>
> Sent: Wednesday, Oct 18, 2000 9:08 PM
> Subject: Re: [hylafax-users] E-mail to fax gateway for Hylafax?
> 
> 
> 
> The mail to fax gateway described is limited to users that use the
> sendmail
> server as their first mail-gateway, usually only local users.
> I hate altering the configuration of sendmail too and have been looking
> for
> a way to fax a mailmessage from anywhere on the net. Just this morning i
> succeeded for the first time.
> 
> It is based upon creating an faxgateway user on my server, who (using
> procmail) accepts messages and uses faxmail to convert incoming messages
> and
> send them out as faxes. The transport of the faxnumber is the difficult
> thing because i did not want to go throug laborous scripting and i wanted
> to
> make use of the default faxmail functionality that already defines a To,
> From, Subject and date field taken directly from the incoming mail.
> 
> I found that the following syntax is allowed througout the mailservers in
> the world:
>    faxrelay+extrainfo@machine.domain.bla
> where faxrelay is the faxgateway user on your server, the + is a
> separation
> symbol and the extrainfo can be used to hold a faxnumber.
> 
> Give me another few days and i'll post the entire working description.
> 
> -Ignace
> 


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