iTechSpeak :::...

• Not having a compelling statement in the "Subject" that makes someone want to open your email.  Hi, hello and hey says nothing to the reader and may even trigger spam filtering, causing your email never to be read. Forbes writer, Kern Lewis's article How To Write A Compelling E-Mail Subject Line covers how to create a sense of urgency.  Also check out 5 Tips for Writing Subject Lines that Will Get Your Emails Opened from Constant Contact.
• Not changing the "Subject" line when the email topic changes.  People can easily think they already read your email, because it has the same topic as a previous email you sent or they sent. Now your new topic gets deleted, without being read. Bye bye to that totally awesome idea you had.
• Using email to initiate a series of back and forth conversation volleys, when a single phone call is more expeditious.
• Introducing new topics in the email "Body", which are unrelated to the topic in the "Subject". 
• Using email as a word processor for lengthy sharing of information. Keep emails short and to the point.
• Bad timing on business email sends. Since business people constantly receive email, Saturday or Sunday may not be the best time to send emails.  By Monday, your email could be pushed so far down and out of sight by the 50-100 emails delivered after your email.  Just because you send an email during the weekend does not mean other people read emails during the weekend. Everyone has different work habits.  Send email when you know there is a good chance a person is in their office AND cleared out their "Inbox".
• Not paying attention to geographic time zones.  Consider your reader's local time zone, when timing an email send. Your email sent at 9AM might be 9PM to your email reader. Better to write an email in draft mode. Then send the email during your reader's local business hours
• Sending email to people in different cultural work environments. Again, consider timing email sends mentioned above. In many Spanish speaking countries, work stops at 2PM and resumes at 4PM.  In Europe, weekends are definitely considered mini holidays. Relaxing and spending time with family is a priority on weekends, especially in France.
• Disregarding country holidays. Keep a world holiday calendar handy.  Time email sends accordingly, to increase the chances of your email being opened and read.

You can tell quite a bit about a person from their email address. Email address name and case lettering may provide clues as to the type of person you will engage. If you think hiring managers, executives, recruiters and business professionals don't pay attention to email addresses, think again. Are you willing to take that risk with the competition in the job market being so fierce?

Your email address should answer the question "Am I committed to presenting a positive professional appearance, while marketing myself and my company?"

Sybil.Krill@anydomain.com is serious about her career or business. She provides an email address that presents a professional posture. A balanced amount of confidence is displayed in capitalizing the 1st letter of each part of her name. She is branding herself, because her email address reflects the same name she uses in her every day life, on her resume, business cards etc..

danny.krantos@anydomain.com almost achieves the same goal as Sybil.Krill@anydomain.com above. He may lack confidence, because the 1st letter in his first and last name is lower case.

bubbalicious@anydomain.com wants to be anonymous, whiling complaining about people not recognizing them or not responding back to their emails. Maybe they are also wondering why they are not getting calls for interviews or business meetings to present their services. This person is definitely not serious about their career or business posture. Cryptic email addresses beg for a response of "I'll get back to you, maybe".

MICHELLE.ARILLY@anydomain.com may love herself a little too much. Having confidence is one thing, but let's not go overboard. Following Internet and instant message rules, all UPPER CASE lettering is perceived as shouting. Is this person going to be high maintenance in the "attention" department?

Gary.Friptal@MyCompanyDomain.com provides the same professional posture as Sybil.Krill@anydomain.com, whiling adding that extra branding touch. Their name is branded and so is their company. Like a commercial, both are tied together. When people see the company name they think of that person. When people see the person's name there is an instant association with that company.

Amy@MyCompanyDomain.com is professional but is it memorable? If you are the only Amy in your company, that might work for a while. What happens, if you leave the company? Amy.G.Winstrom@MyCompanyDomainName.com works better. If you change companies, your personal name brand recognition still goes with you.

A single name works best, if you purchase a "vanity" domain that contains your first and last name (i.e.Amy@AmyWinstrom.com). Now you're cooking with branding gas.This can follow you no matter where your business travels take you.