[Simon Walter] Re: Bug#506353: mailscanner: many scripts allow local users to overwrite arbitrary files, and more, via symlink attacks

Julian Field MailScanner at ecs.soton.ac.uk
Tue Dec 9 14:13:07 GMT 2008

On 9/12/08 11:58, simon.walter at hp-factory.de wrote:
> Hi,
>> Send me mail from a badly setup domain, and you better not be surprised
>> when I don't accept it. The RFC makes it very clear that MX records can
>> only point to A records and not to CNAME records.
>> Get your DNS fixed and I will happily accept your mail.
>> :-)
> Yeah, I have got that...
> I can't get my DNS fixed because it's not mine. I have to wait till
> someone else does it and I don't know when that will happen.
> Funny how everybody focuses on this little, unimportant, technical problem
> but ignores the real cause of my mail.
But if your mail never reaches me, how am I supposed to know what's in 
it? :-)
> Did you read my first mail which started thsi thread?
What would you recommend as the best solution to the problem?


Julian Field MEng CITP CEng
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