Proszę niech ktoś sprwdzi czy to jest poprawnie:
Once, many people have written letters to keep each other contact. Then, when the telephone became popular, and it was soon to talk to who you wanted. But, writing a letter can not live chat and phone conversations can not send documents. Then, when the technique began to move on invented a new kind of mail - e-mail. It has advantages and disadvantages. For example, in the few seconds it comes to the recipient which is much needed when you want to upload your document to someone quickly, and the list needs a few days. E-mail attachment możemu attach a document which contains, np.umowę or simply pictures or movie. There are also disadvantages of such mail. Sometimes it happens that the e-mail reaches the recipient, or block our email because someone sent us a lot of photos at once. Therefore, I recommend the use of e-mail when chcey send a document, and if this is an important message is using the "receipt".