how to allow mobile user to send email with getting blocked

[Martin Hepworth]

I would have a sendmail listening on a different other than 25 and
have this be trusted with passwords etc. This can route without
mailscanner ( or a less restrictive setup eg no SA being called )

It's fairly common these days for the outgoing mta for clients to be
on something other than Port 25

Martin

On Friday, 17 June 2011, Alex Neuman <alex at vidadigital.com.pa> wrote:
> This has been asked in the past, and I repeat my solution for the benefit of those who haven't had the opportunity to search the archives for a solution.
>
> If you're not using sendmail as your MTA you can try doing something like this on your own MTA similarly.
>
> My sendmail.mc has a line like this:
>
> define(`confRECEIVED_HEADER', `_REC_HDR_
>         _REC_FULL_AUTH_$?{auth_ssf} MYOWNTOKEN bits=${auth_ssf}$.)
>         _REC_BY_
>         _REC_TLS_
>         _REC_END_')dnl
>
> Where "MYOWNTOKEN" is something not trivially guessable.
>
>
> Then in /etc/mail/spamassasin/local.cf I add:
>
> header MYOWNTOKEN ALL =~ /MYOWNTOKEN/
> score MYOWNTOKEN -100
>
> This way, everyone who *REALLY* authenticates in my server gets scored -100 and therefore it doesn't get flagged as spam.
>
> On Jun 16, 2011, at 6:10 PM, Harondel J. Sibble wrote:
>
>> Just wondering what you all suggest is the best way to deal with the
>> following.
>>
>> Mailscanner machine at the enge of the network, internal imap mailserver,
>> users with mobile phones connected via imaps to the internal server with
>> various mail clients.
>>
>> SMTP Auth is in place for all users to send email.
>>
>> Approx 50% percent of the time, the users on one cell provider (Mobilicity)
>> have their mail marked as spam and quarantined, generally users on Rogers,
>> Fido, or Telus don't have the same problem or not to same extent, eg
>>
>> SpamAssassin Score:   4.42
>> Spam Report:
>>       Score   Matching Rule   Descriptioncached       not
>>       score=4.423
>> 4     required
>> -2.60 BAYES_00        Bayesian spam probability is 0 to 1%
>> -3.30 KHOP_DNSBL_ADJ
>> -1.50 KHOP_THREADED
>> 1.96  RCVD_IN_BL_SPAMCOP_NET  Received via a relay in bl.spamcop.net
>> 1.70  RCVD_IN_HOSTKARMA_BL
>> 2.00  RCVD_IN_MSPIKE_BL
>> 0.01  RCVD_IN_MSPIKE_L3
>> 2.40  RCVD_IN_PSBL
>> 0.62  RCVD_IN_SORBS_WEB       SORBS: sender is a abuseable web server
>> 3.03  RCVD_IN_XBL     Received via a relay in Spamhaus XBL
>> 0.10  RDNS_NONE       Delivered to trusted network by a host with no rDNS
>>
>> I've considered client ssl certs but not all the devices/mail client apps
>> support this so not really a solution?
>>
>> What would you suggest is the best way to keep their legitimate emails from
>> being blocked by the mailscanner machine.
>>
>>
>> --
>> Harondel J. Sibble
>> Sibble Computer Consulting
>> Creating Solutions for the small and medium business computer user.
>> help at pdscc.com (use pgp keyid 0x3AD5C11D) http://www.pdscc.com
>> Blog: http://www.pdscc.com/blog
>> (604) 739-3709 (voice)
>>
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>>
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>
>
> --
>
> Alex Neuman van der Hans
> Reliant Technologies / Vida Digital
> http://vidadigital.com.pa/
>
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-- 
-- 
Martin Hepworth
Oxford, UK