There are many reasons you may want to see and switch from default mail client i.e Gmail in your Android Phone. You may want new look, bore of using same application, colors of your email client etc. As we can choose many of new email clients from Google Play (Android market). We have mentioned some below.
PROS: Very balanced, very fast and configurable, I download all pictures and files when I arrive, can be used in any device. For those who have not ever heard of this manager, it should be noted that this is an open source application, which carries obvious advantages, as it anyone can see how the application works internally and examine how safe is in managing access to mail servers, etc..
CONS: The icon is ugly (is a cybernetic dog), does not show the unread messages from the desk.
PROS: Very similar to the operation and configuration as k-9mail puts you unread messages from your desktop, you can set schedules, mark read in the original email when you read from the phone. Enhanced Email is a fully featured but lightweight E-mail client that can easily aggregate all of your e-mail accounts into a single location. Whether you are a regular e-mail user just needing to keep in touch with friends/family or a power business user needing to synchronize calendar/contacts/email with your Exchange server, Enhanced Email is the only application you will need.
CONS: Missing is the unread messages counter on the App icon.
MailDroid:
Pros: With MailDroid one can configure different email accounts for use from the same manager, so you do not have to change your app to check mail from different domains. In addition, you can configure both preferences of each account separately, as the firm, auto copies (CC, BCC), etc. As application preferences in general, as the theme, size of the lists, account to be opened by omission … and a very interesting, as is the password protection to prevent any gossip read our emails if fiddling with our phones.
Cons: Also, besides the advantages there are some cons, as in the case of MailDroid, managing various email accounts is some trouble. But what is most striking is the enormous customization / configuration allows.
In short you can choose any of the above email client listed according their pros and cons and have a satisfaction of having some thing new in your Android Phone.