yes
yes
Yes, GMail is a e-mail service provider.
It depends who your service provider is. You can often cancel your subscription (if you have one), or simply allow it to lapse. If you are referring to a sent email then that is not possible.
EMail services are different than the internet provider. The internet provider is the person who provides the internet, while the email service prodiver gives the email service.
What are the Safety measures taken by email service provider?
Yes, it is possible to change your internet service provider address but it is usually necessary to change your email address or obtain a secondary email. This is much less complicated than removing current ISP from your computer which involves deleting and uninstalling current ISP software.
It is accessable through one's regular email provider. It can be used on whichever email service pleased, so one can keep their same service provider if they would like. Another way is to go to the website and sign in using your ID and password.
Yahoo is an email service provider.
type of service provider
That depends on your mobile phone service provider, your e-mail service provider, and/or the make and model of your phone.
You can usually send up to about 10 MB but it can vary depending on who your service provider is and which service provider you are sending it to.
My yahoo email account has been acting up lately and a friend has suggested I use a service called "gmail". Is gmail a trustworthy email provider?