Why text messages are limited to 160 characters. May 3, 2009 | 1:28 pm. Credit: Lori Shepler / Los Angeles Times. Alone in a room in his home in Bonn, Germany, Friedhelm Hillebrand sat at his typewriter, tapping out random sentences and questions on a sheet of paper.
USPS does not offer a guaranteed overnight service. Priority Mail Express may be 1-day or 2-day service, depending on destination; the earlier deadline always applies. For example, my neighborhood PO closes at 5:30 p.m., which is also the time of the last pick-up for the collection box outside the door.
The short answer: As soon as you can. The long answer: It is obvious that some e-mails will be more important to you than others. It also is clear that we only have so much time in a day and there will be days where you will be unable to reply to any e-mails at all. So, you do the best you can to reply to everyone as soon as you can.