They can't read your terrible handwriting.

Luckily, your mail should get where it needs to go as long as the postal code and address number are legible - but you still might want to work on your penmanship.BassittART - Getty Images

It’s not their fault that your package is damaged.

If a box shows up to your house in a less-than-stellar state, it’s very likely that it was that way when the mail carrier received it from the original shipper.Peter Dazeley - Getty Images

Yes, the motto is true.

While it's not officially recognized, mail carriers take this unofficial creed to heart: "Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds."Jim Reed - Getty Images

Halloween is one of the worst workdays of the year.

With all of the costumed children causing traffic jams on the sidewalks, not to mention all of the mischief, delivering the mail on Halloween is more trick than treat.Catherine Delahaye - Getty Images

Junk mail is not their problem.

If you want to put an end to the madness, you'll have to contact the offending companies themselves.carstenbrandt - Getty Images

Actually, junk mail is good for business.

And not just for those credit card companies that flood your mailbox. When you're targeted with unsolicited fliers, catalogs and beyond, that means more business for the Postal Service. Sorry, trees.John M Lund Photography Inc - Getty Images

Don't put non-stamped items in your mailbox.

Technically, the inside of a mailbox is property of the United States Postal Service. So if it doesn't have a stamp, it doesn't belong there. Even if you just wanted to leave something for your neighbor.Tetra Images - Getty Images

Yes, dogs are a danger.

Thousands of attacks occur annually - 6,244 in 2017, to be exact - so don't be offended when a mail carrier is wary to walk by your pup. Even the friendliest dog can be territorial at times.Barbara Brady-Smith - Getty Images

They even carry dog repellent.

To protect themselves, mail carriers will use a dog repellent spray-but only when it's absolutely necessary. If an animal appears menacing, they simply won't deliver the mail to that address. The repellent, a pepper spray, is used to combat surprise attacks and doesn't do any lasting harm to the dog.Gwendolyn Plath - Getty Images

They can't go around handing out treats to every dog.

While this might seem like a nice way to keep mail carrier-canine conflict to a minimum, it could condition dogs to expect treats and be even more aggressive towards strangers who don't give them one.Design Pics - Getty Images

They walk far.

Like, really far. One mail carrier estimates that they cover an average of ten miles on foot each day.Matteo Colombo - Getty Images

The trucks drive like a dream.

Or, at least, handle better than you might expect for a big, boxy automobile.mcdomx - Getty Images

Forgetting postage can be pricey.

A mail carrier can remove anything without a stamp on it from your mailbox and even bill you for due postage.Jay P. Morgan - Getty Images

Summers are unbearable.

To add to the physically grueling nature of the job, many of the trucks do not have air conditioning.Captainflash - Getty Images

They need to know about your vacation plans.

If you wont be home for an extended period of time, please put your mail delivery on hold. Not only will it make your mail carrier's life a lot easier, it'll keep your home or apartment from looking like you've been out of town for a while.
R&D FOTO - Getty Images

Don't ever block your mailbox.

It doesn't matter if it's your car or recycling bin - obscuring the path to your mailbox will result in your mail not being delivered.Roy Ritchie - Getty Images

They do have favorite customers.

You're not just imagining it.PeopleImages - Getty Images

They appreciate the offer, but can't come in and chat.

With so many stops to make, they can't spend valuable time making conversation-even if you offer them coffee, tea, or ice cream.Caiaimage/Sam Edwards - Getty Images

Working on Saturday isn't so bad.

Yeah, they're working while you're relaxing, but it's a relatively easy day since there's less mail to deliver.
Caiaimage/Paul Bradbury - Getty Images

They're being tracked.

It's not part of a conspiracy or anything. Managers keep tabs on their mail carriers thanks to GPS tracker on the scanners they use for deliveries.John Lund - Getty Images

They're probably listening to music.

If it's the sounds of their feet against the ground or their favorite tunes, you best believe they're rocking out to the latter. In a professional manner, of course.Eleonora Festari / EyeEm - Getty Images

They deliver some pretty strange stuff.

From sledge hammers to live animals, if it can fit in an Postal Service-approved package, they'll get it where it needs to go.rezendeluan - Getty Images

You can thank them with a gift.

But if it's over $25 in value, they'll have to report it to management.William Andrew - Getty Images