Well through your e-mail address, but beware. Usually it's spam, like the e-mails about the displaced royalty in Nigeria which needs to move it's funds, etc...
It's just best to not even open it, sign it as a spam and delete it on the spot.
Some companies that provide branded emails include Wizid, Branded Emails, and eMailSignature. You can also learn how to code your own branded emails at MailChimp.
Appears to be a ficticious name andaddres just as in the Nigerian emails scam
Companies that do email direct marketing tend to buy the emails they use from companies that aggregate lists of emails. They obtain the emails as a result of people ticking yes to having their email used by advertisers.
what are the emails of the registered insurance companies in Cameroon.
Not true. Most companies monitor their employers emails to ensure that they are not doing anything illegal or sending porn or bad emails that will make their company liable for a lawsuite. Completely legal for an employer.
I never give my personal email to companies who ask for them. I don't want to be bombarded with their emails. Plus, you don't know which ones have the habit of sharing emails with other companies.
These are emails that try to lure you into doing something. Generally giving out personal and financial information. Scam emails often pose as legitimate emails with companies you may already be dealing with. They attempt to impersonate these companies to gain your trust. Here's a great article on how to identify scam emails and what you can do:http://www.cleverferret.net/269/how-to-identify-scam-emails/
Phishing
phishing
Looks like this fictitious name is part of a Nigerian 419 scam. Don't respond to emails requesting assistance to procure.
Whether or not you should trust sales emails from online companies depends on the company in question. Some companies are completely legit, while others will try anything to make a sale.
Phishing : Cyber criminals send legitimate looking emails to customers of banks and credit card companies asking them to update their account information by clicking on a Web link that sends the customer to an official-looking but actually fake site.