what can be the advantages and the the disadvantages of the web mail services?

* we can compose a email anywhere.
*There is no need of downloading the messages.
* we can follows the similar kind of sign ups for made by the different companies.

If we concerned about the disadvantages of the web mail then it can be..
* The user always should be online.
* they not provide the proper mail storing space.
* Heavy use of web mail in a slow unit can be a hectic for us .