in the post
En route now
In the post refers to being in transit through the postal system: Your package is in the post.
The phrase is primarily British English; Americans typically say "in the mail." It can also mean something has been sent but not yet received: I put the check in the post yesterday.
- mailPostal system items
- letterWritten symbol or message
- parcelWrapped item for shipping
- packageWrapped item for delivery
- envelopeFolded paper enclosure
return address · in transit · dispatch · telegram · tracking · mail carrier · invitation · greeting card · snail mail · junk mail · underway · stamp · first class · priority mail · special delivery · courier · notification · invoice