RES Re: Postfix removal - yikes

[Tom H]

On Mon, Jan 31, 2011 at 2:50 AM, Nick Edwards <nick.z.edwards at gmail.com> wrote:
>
> RESOLVED
>
> Got an email from debian dev. suggested remove using:
> dpkg --ignore-depends mail-transport-agent -r postfix
> also gave me instructions for building a dummy package using equivs, this
> has got things where I want it and package managers dont complain
>
> On Thu, Jan 27, 2011 at 1:37 PM, Nick Edwards <nick.z.edwards at gmail.com>
> wrote:
>>
>> The following packages will be REMOVED:
>>   lsb lsb-core lsb-cxx lsb-desktop lsb-graphics lsb-languages
>> lsb-multimedia lsb-printing mailx postfix
>>
>> I am going to use another non-debian (no repo) mail system so I need to
>> remove postfix, can someone offer hint on how to do this
>> without losing all the other files as well?
>>
>> crazy to remove mailx since a system can send mail without postfix or
>> sendmail, exim, et al.

Your mail-transport-agent line has made me realize why my previous
suggestions failed. I'd grepped bsd-mailx's dependencies for postfix
rather than for "default-mta" or "mail-transport-agent "... :(

Sorry!

Having said that, if you use "aptitude remove postfix" you're first
prompted to remove bsd-mailx. If you reply "n", you're then prompted
to install "lsb-invalid-mta", which installs a fake "a fake
/usr/sbin/sendmail".

What are the "instructions for building a dummy package"?