If a person accidentally puts a letter in an USPS express mailbox, versus the regular USPS mailbox next to...?

Question

it, will it still get through to the regular mail, in the regular amount of time? I'm asking since my daughter mailed our rent check in the express mail box and now I'm worried it will be late. It's only one town over where the envelope is going to.

Answer 1

They will get it where it needs to go the same as if you put it in the right box don't worry it happens all the time. they have a very smart sorting system.

Answer 2

It won't be a problem, they'll sort it out.