mechanic in English:

I don't like my postman because he comes late.

The postman was bitten by that dog.

He's a postman.

Has the postman been yet?

As they were leaving; the postman arrived with the mail.

Hardly had she got in the bath when the postman knocked on the door with a parcel.

Rain or shine, the postman delivers the mail.

Mailing complete. I leave the rest to you, postman!

The dog went for the postman.

Boxing Day, when presents are given to the postman, the milkman, etc., is the first week-day after Christmas.

The postman delivers letters.

The postman comes at 7.30.

Three days later, just as I set off for work, the postman handed me a letter.

Postmen are usually afraid of dogs. Our postman visits us every Tuesday morning.

It must be the postman.