Every Time you sign up or post comment on a website they always require your email address and then some of the sites spam your inbox with unwanted emails everyday.moreover the main problem is that there are thousands of automated bots that are configured to collected emails automatically from websites and send them spam emails.So, I do not recommend you to use your personal email accounts on spamming websites instead you should use the temporary or the disposable email services.
These temporary or disposable email services do not require you to register for using there service.Most of the email address will automatically expire after a limited period of time.You do not require any password to access them and they are totally free.I have collected a list of Top 15 Best Temporary and Disposable Email Services on internet.
TOP 15 DISPOSABLE / TEMPORARY EMAIL SERVICES
Mailinator : It is one of the best and most widely used temporary email service on the Internet.Your email address will look like firstname.lastname@example.org
MyTrashMail : If you sign up for them you can get a secure temporary mail box otherwise you will get the same services like mailinator.Your address will look like email@example.com
MailExpire : With this service you can set the expiry time of your email service between a time range of 12 to 3 months.
TempInbox : It is another good temporary email service.
Jetable : It has the advantage that you can also set your email expire time but you can also set it to forward your emails to your personal mail account
SpamBox : Like other services it also allows to set email life span and your email address will look like firstname.lastname@example.org
GuerillaMail : It allows to generate an address that can expire within 15 minutes
10MinuteMail : Its work is same as its name i.e 10 minute email address
TempoMail:-They have good spam detection mechanism and your temporary email address has very less spam
TempeEmail: Aims to give you a fast, anonymous yet secure temporary email inbox
SpamFree24 : Services are same as all other temporary email services
SpamMotel : You can also reply from the email address that you got from spammotel.
Anonymbox : Services are similar to all other temporary mail services
Spam.la : Another good and reliable disposable email service
E4ward : You can create your disposable email address , all the emails sent to this address are forwarded to your private email address. If an alias is ever spammed then you can easily dispose of it.
There are many other similar service available on net. You can find them using google.