It is the default way to communicate in business, but with comes the pitfalls. Spammers have become very resourceful in phishing for valid email address, and most websites that provide a free service collect email list and sell them to make their dollars.
So turn the spam filter up and try to avoid these common mistakes:
1. Avoid using aliases. The more mail servers email has to go through, the more it looks like spam and the more places troubles can occur.
2. Avoid “re:”, :fwd:” in subject lines. These are one mark against you in the spam filter check list.
3. Avoid send mail to multiple addresses in the same email. Viruses do this and the filters can block the mail and lock down your ability to send because of it.