The mail is arriving later and later for many people, with some receiving their mail after 5 p.m.
Drastic cuts by the United States Postal Service are behind the delays.
The mail is supposed to arrive Monday through Saturday before 5 p.m., but cost-cutting measures have been pushing back delivery times.
A new report by the U.S. Postal Service finds mail carriers in many cities are delivering mail at night at least two days a week.
Nationwide, mail in cities was delivered late about 38% of the time last year, that's compared to 25% in 2011.
The post office says a shrinking workforce is the reason for the late mail.
It says its workforce is at the lowest levels since the 1960s. Fewer workers means longer routes.
Now, while getting the mail can be an inconvenience for you, it is dangerous for carriers.
In November last year, a postal carrier was shot and killed in Maryland while delivering the mail late. Still no arrest has been made in that case.
Carriers say they have been robbed and assaulted as well while working at night. Many are demanding the postal service allow them to start their shifts earlier to cut down on evening deliveries.
The postal service acknowledges late delivery is a real safety concern. Its Inspector General is recommending better planning and supervision to help cut down on evening deliveries.
It also says brighter colored reflective clothing could also help ease safety risks, along with safety training and realigning some routes.
Unions are pushing for the postal service to hire more carriers and change how the mail is processed.