It depends on what glyph coverage you want. Here's the font table for the T1 encoding



and here is the table for the LY1 encoding



You can compare them and decide what suits you best. For English, French or German and some other languages the LY1 coverage seems complete. It's not for the Slavic languages using the Latin alphabet (except perhaps Slovenian).

Should I use the font encoding LY1 with the package libertine?

  Possible Duplicate:
  How to implement a white-list-based system in Gmail?  




I only want to accept email from two addresses, the rest I want to delete immediately, unseen.

I know how to make filters and I can white-list those two addresses. 

If I make 3 filter, in this order;

1) from a@a.com move to inbox, never mark as spam
2) from b@b.com move to inbox, never mark as spam
3) from *@*.* delete immediately, never move to trash

can I be guaranteed that that will do what I want?

For instance, can I be sure that the filters are executed in that order? I don't want to lose any mail from those two addresses.



[Update] The accepted answer was almost correct, but instead of doesn't have &lt;list of email addresses&gt; (which did not work) I used from ~{&lt;list of email addresses&gt;}

The tilde ~ negates and the curly braces {} delimit the list. So, mail from anyone who is not in the approved list will be filtered.
