As writers, we all have to go through some rejections, sometimes. It is not the most wonderful feelings to have, especially when the rejection came with a warning of suspension to the site. When this kind of rejection occurred, it hit deep in the guts. It recently happened to me. One of my articles that I had worked on for over a month was “similar and copyrighted to another site”, which I didn't even know, nor was I online to do research for that particular piece.
After the initial shock, I decide to get over the assortment of sad, pain, humiliating, and disappointing feelings. I must find a way to deal with rejections, and here is what I have come up with.
Accept rejections with your head high

It is hard to read the rejection words, but just keep your head high anyway. After all, if you are innocent from accusation, your soul is at peace. You know what you did or didn't do.
If the rejection is about grammar, too common of a topic, fix it, and know in your heart that sometimes rejection makes you a better writer.
Rejection from editors is not a personal attack

Think of rejection notice as a way to improve your skill. Editors do their editing job very well. Give thanks to them. In our normal life, we come across a lot more of unpleasant things. Rejections are not a personal attack. They are just a transition to better ourselves, and our writing.
Make sure to research your topic

Learning from this mistake, make sure to check out your topic online, and on the site you plan to submit your work. This will definitely take more time than the act of writing itself. However, who said the writer's job is easy? We have to keep in mind that we actually have four jobs: researching, writing, publishing, and promoting.
Keep on writing and submitting

Don't be discouraged. Keep on writing and submitting. Get back on that horse, and ride! You are a writer, and you love to write. So ease the pain of defeat, because writing is very therapeutic to your wound. It helps you to get over the hurdles, and soar into the blue sunny sky.
Remember what you loved

You are not in this field if you don't love what you are doing. Everyone knows that we are not making a good living with our writing. We write because we have a passion, an obsession, and an addiction to writing. The majority of writers hold another full job in order to sustain the cost of living.
These solutions may seem simple, but it works for me. I hope it will enlighten you as well. If you have any other ideas, please share. I can't wait to learn new things.
Your work is awesome! You just keep your head up high knowing there are folks out here who enjoy reading your articles! =)
SunGoddess