The question of, “Will mail be delivered on Ash Wednesday?” is answered with a big “Yes.” All post offices and federal offices of any kind are open for the holiday, so you will have no problem getting your mail.
Holidays on which mail is not delivered are:
New Year’s Day
Martin Luther King Jr’s Birthday
Washington’s Birthday (President’s Day)
For more information on Ash Wednesday as well as Lent, check out the below links: