I love my parents. But damn, they send some annoying emails. Urban legends. Chain letters. Petitions. Peculiar font choices. Long rambling messages with no clear meaning or point... GAAAAAH!
Mom! Dad! Cut it out!
Yes, that animated gif of a sneezing panda bear is adorable! But it has no place in your email signature. And while I would love to know more about who you ran into at the grocery store today, email isn't a good medium for that. That lists of facts about the housing crisis you forwarded me? Completely untrue. No, forwarding me an email will not contribute any money to anyone, anywhere, for any reason. No, I do not think those fwd: fwd: fwd: cute puppies are cute. Please, just don't forward me anything, okay? Why does your subject line go on for three sentences? I can't read that. How did you even type it?
And, look, I can't even talk about your typography decisions yet. I'm sorry, I just can't.
Here's the thing. Your parents almost certainly don't get as much email as you do. They likely spend far less time wrestling through an inbox. Moreover, the email they do get probably tends to be disproportionately personal—the kind of message where it's okay to have a sparkling animated American flag crying eagle tears above some apocryphal Abraham Lincoln quote that goes on for six paragraphs embedded in the signature. (Or at least, okay-er.) It's not that they mean to send infantile email, it's that parents just don't understand.
It's on you to fix this. Think of it this way: when you were a child your parents did things that probably hurt your feelings, but that you were better off for in the long run. They taught you to be polite and to have good manners, how to share, and not to tell lies. It was probably just as hard for them to teach those lessons as it was for you to learn them. Now that you are an adult, you need to do the same thing for them.
There are basically two steps to handling poor parental emailing. First, you need to set some guidelines, and if the problem doesn't stop, you're going to have to address infractions on a case by case basis. Think of them as preventive, and putative measures.
Start off by sending them some helpful pointers. Do this seemingly apropos of nothing, rather than in response to a problem email. The email charter makes a good starting point. Or you can even send a link to this story. Just include a little note like, "hey, Mom I found these email tips really helpful, and I bet you will too!" You want the message to be informative, but harmless.
Or let's say there is a particular issue that needs addressing. For example, your father has an urban legend problem. You need to let him know that he's kind of making a fool of himself. But he's your dad. So be covert about it and explain the issue in a way that spares his feelings but resolves the problem before he sends another one about Mitt Romney's secret nipple enhancement operations. Actually, you can just copy and paste this (I think it's pretty good):
I was just reading an email from SOMEONE ELSE'S NAME, and was once again appalled at the amount of misinformation floating around the Internet. I hope you don't mind me venting, but I knew you'd understand. I just can't believe how few people know that most things received as email forwards aren't true! I wish people would check Snopes.com to see if something was true before sending it along. Especially if it seems farfetched. Sorry to bug you! How's everything in PLACE YOUR FATHER LIVES?
Love you, (optional)
Try and do this in advance. If you just, say, send a link to Snopes as a reply without first having addressed the problem, you could hurt a parent's self-esteem. Your mom gave birth to you! Don't hurt her feelings over an email forward. And the thing is, no matter how old or smart or successful you are, they are still your parents. They wiped poop off your butt. They may have a hard time taking your advice. Be subtle.
But once you've sent preventative guidance, you've got to level up if the problem persists. You might send 200 emails a day, but someone making these kinds of mistakes probably doesn't—and he or she could use some additional hand-holding. So don't be a jerk about it and be sure to be clear about what the end goals are.
For example, I sent my mom the email charter. She loved the idea of using [eom] in the subject line. (EOM is shorthand for end-of-message, it's designed to let someone know they don't have to actually open your email.) So instead of long rambling emails, she began sending me long rambling subject lines. Because the subject lines were too long to be read in my inbox, I still had to open the message thus defeating the entire point of [eom].