A total of 14 entities issued stamps for their private mail service, most of them in the 1920s and 1930's.

After all, in the age of private overnight mail, why not private jails?

I'm not used to getting much private mail.

It still has a mail collection box in its wall, but this is only used to receive private mail now.

By private electronic mail, I got a good many personal replies, some in highly unsanitized language.

The level of discourse is often knowing, even sophisticated, and by private electronic mail I've made friends with gardeners across the country.

He never arranged for the postmaster to spy on the private mail of a fellow senator.

The message was circulated among some subscribers through private electronic mail.

Like opening someone else's private mail, filled with the most disturbing kind of secrets.

Under the constitution the Free City had the exclusive right to private mail.