By this do you mean email stored on the internet (e.g. with free providers like gmail, Yahoo, hotmail or paid providers)? If so, generally using email on the internet is not a good idea for critical data that is needed at any time, rather then being stored on the computer or local network, as sometimes the email provider's server might (albeit rarely) go down, or your internet connection might not be reliable.
you get masses of spam/junk mail from companies
Email clients are programs intended to access remote mail servers and retrieve mail from them. Email clients allows also to compose and send email messages. Email client is a perfect solution for dial-up connection, since the messages can be viewed without an Internet connection. But there are much more email clients that are worth mentioning. Web based email clients gained great popularity among the Internet users. The main disadvantage of the web-based mail is that is the lack of offline capability.
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.
Internet email is a service provided by companies like Hotmail, MSN and AOL. It is email which you can access via the Internet. AKA Webmail.
Too much freedom
The only disadvantage will be internet speed.
"The disadvantage of using online applications is that, if the internet goes down for any reason, you will not be able to finish your work, without an internet connection."
advantage and disadvantage of email commercal
One disadvantage to using email is the fact that employees can misuse the email system. Instead of emailing work documents, they can use it to email their friends.
Request it from your internet/email provider
The PSP can check your email and browse the internet with it's wifi capailities.
On disadvantage of email over voice mail is voice can by tone and inflection convey the intent of the message, email can't do that.
The internet