Messages quarantined due to: Allow WebBugs = disarm

[Shawn Iverson]

Sample (sanitized if needed)?

On Thu, Aug 1, 2019, 1:46 PM Carles Xavier Munyoz Baldó <
carles at unlimitedmail.org wrote:

> Hi,
> Since some days ago, I have had some e-mails don't delivered to my end
> users due to this error message:
> MailScanner[14567]: Quarantined message x71GlTpg013562 as it caused
> MailScanner to crash several times
>
> Investigating the problem I have discovered that it is caused by this
> configuration option:
> [...]
> # Do you want to allow <Img> tags with very small images in email messages?
> # This is a bad idea as these are used as 'web bugs' to find out if a
> message
> # has been read. It is not dangerous, it is just used to make you give away
> # information.
> # Value: yes     => Allow these tags to be in the message
> #        disarm  => Allow these tags, but stop these tags from working
> #                   Note: Disarming can be defeated, it is not 100% safe!
> # Note: You cannot block messages containing web bugs as their detection
> #       is very vulnerable to false alarms.
> # This can also be the filename of a ruleset.
> Allow WebBugs = disarm
> [...]
>
>
> If I modify it for "Allow WebBugs = yes" then the problem dissapears.
>
> But the strangeous thing is that this problem has arised suddenly, maybe
> after an OS (we are using Ubuntu 16) software update, but we are not sure.
>
> Any one knows why?
>
>
> Thank you very much for your great help!
>
> ========================================
> SOLTECSIS SOLUCIONES TECNOLOGICAS, S.L.
> Carles Xavier Munyoz Baldó
> Departamento de I+D+I
> Tel./Fax: 966 446 046
> cmunyoz at soltecsis.com
> www.soltecsis.com
> ========================================
>
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