postmark

As nouns the difference between postage and postmark

is that postage is the charge for posting an item while postmark is a marking made by a postal service on a letter, package, postcard or the like, usually indicating the place where and the date and time when the item was received or processed for the first time, and often serving to cancel a postage stamp.

As a verb postmark is

to apply a postmark on.

is likely misspelled.

has no English definition.

As a noun postmark

is a marking made by a postal service on a letter, package, postcard or the like, usually indicating the place where and the date and time when the item was received or processed for the first time, and often serving to cancel a postage stamp.

As a verb postmark

is to apply a postmark on.

As nouns the difference between ostmark and postmark

is that ostmark is the currency unit of the former german democratic republic (aka gdr, ddr, east germany) until 1990, abbreviated ddm while postmark is a marking made by a postal service on a letter, package, postcard or the like, usually indicating the place where and the date and time when the item was received or processed for the first time, and often serving to cancel a postage stamp.

As a verb postmark is

to apply a postmark on.