Nowadays email marketing has become more crucial. Even though you are a legit email marketer with a double option list, your emails may not be delivered to the recipient’s inbox. According to survey, more than 20% of email registrations contain typos, syntax, domain and other errors. Sometimes even if you are sending mail to an older email list, few email addresses can bounce back. It can also cause the email addresses to offset the balance and raise a flag with Email Service Provider (ESP) or Internet Service Provider (ISP). Some email marketers think that it is easier for spammers to reach recipients inbox than a company with a good message.