Email is still the most popular way of communication throughout the world. The most popular email for personal use is Gmail and for enterprise use is Exchange and Outlook. Outlook is basically an email client. It has many features which are good in comparison with Gmail. One particular thing is email thread structure.
In this mobile first world everyone wants to configure email in their phone. The most important advantage to have email in phone is, you can check and reply your important email on the go. Gmail is the most popular personal email service currently. You can configure Gmail into your Windows Phone also.
If someday you can not find your mails, please make sure you check the other tabs also.
I wrote about email signature before. It is a text which automatically append at the end of email body. How should one design email signature depends on personal preferences. It should be short and informative. If you are sending email to someone who do not know you, then signature comes into play which is holding some information about you. There are some guidelines on what should be a good email signature which I pointed out in my previous post about email signature. Also some company has its own policy in email signatures. They use long text including company details and even company logo also. For your personal email account you can give your personal information on that. For example I use to give my personal website URL in personal email signature.