root@august:~# sudo aptitude install sendmail
The following NEW packages will be installed:
  procmail{a} sendmail sendmail-bin{ab} sensible-mda{a}
0 packages upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 156 kB/919 kB of archives. After unpacking 2,953 kB will be used.
The following packages have unmet dependencies:
 sendmail-bin : Conflicts: mail-transport-agent which is a virtual package.
 postfix : Conflicts: mail-transport-agent which is a virtual package.
The following actions will resolve these dependencies:

     Remove the following packages:
1)     postfix



Accept this solution? [Y/n/q/?] y