And once each month, mail would arrive in California after a slow trip by wagon from Saint Louis,Missouri.

VOA: special.2009.05.28

Some mailers may want to saturate an area with mail, while others may want slow, steady delivery.

CNN: Save the Postal Service from collapse

It feared that enabling the encryption would slow down response times as data was scrambled and unscrambled on a PC and Google's mail servers.

BBC: Google tackled on e-mail security