Thanks Omnitech. I just wanted to point out that you should be able to purchase the full unlimited app directly through your Z10 browser ( with latest OS) on their website. AquaMail: English: About - Aqua Mail
This is what the developer says it can do:
asy automatic setup for popular email services: Gmail, Yahoo, Hotmail, FastMail, Apple mail services (@me.com / @mac.com), GMX, AOL, and more. Recognizes mail accounts at domains hosted by Google Apps, Yahoo BizMail, and others.
Works with many other email services via standard Internet email protocols (IMAP, POP3, SMTP) as well as Microsoft�s EWS (Exchange Web Services) protocol.
Microsoft Exchange is supported via IMAP or EWS. EWS includes access to server side contacts (personal and global, with lookup), and accepting meetings that can later be viewed in Outlook and other apps.
Easy automatic setup for Office 365 and Exchange Online.
Push mail for IMAP (instant incoming email delivery) for those servers that support the IDLE extension (Gmail, GMX, AOL� not supported by Yahoo).
Plays well with other email apps that you may be using to access your IMAP or EWS mailbox. Uses existing folder structure, can synchronize drafts, sent, and deleted messages.
A note on Hotmail: automatic setup uses POP3; Microsoft does have IMAP which provides folder access, please see this for details.
Can save attachments on the memory card, can attach any file type (a file manager is required for picking, my favorites are ES Explorer and Solid Explorer).
Widgets (two kinds: message counts and message list) can be configured for a specific account / folder / smart folder (unified inbox).
Message auto-fit (like in Gmail) on Android 4.0 and above.
Rich text formatting when composing messages, including the signature (as of 1.2.5.0: font style, color, size; no embedded images yet).
Seamless viewing of winmail.dat attachments (Microsoft Outlook message format) and attached .eml messages.
A built-in address picker where you can select groups (all at once or individual items), recent addresses not entered into the system�s Contacts app, and Exchange server side contacts.
Supports for Sony LiveView accessory is built-in, and the newer Sony SmartWatch MN2 and Sony SmartWatch 2 SW2 are supported via an add-on.
Lots of settings and options let you configure the application just the way you would like.