Recs.
Updated
SpecsUpdate
Pros
Pro Clustering of e-mails by sender
organizes similar emails together to remove a lot of clutter from your inbox, without hiding any emails. It categorizes emails from known senders into smart clusters, and organizes your emails into a sub-folder structure automatically, without the hassle to manage it manually. Any email that comes into a cluster acts as a reminder for the previous emails you might have missed, so as soon as a new email is received from that service or person, the cluster pops up to the top of your inbox.
Pro Highly customizable notifications
Offers a lot of different preferences (like Quiet Hours, Custom Sounds, Vibrate, LED Light, Snooze Alerts, etc.). You can set different preferences for each of your accounts.
Pro Integrated calendar
Actually for me the integrated calendar is a CON. THO a Mail app has to concentrate on mail.
Pro Email Clusters
organizes similar emails together to remove a lot of clutter from your inbox, without hiding any emails. It categorizes emails from known senders into smart clusters, and organizes your emails into a sub-folder structure automatically, without the hassle to manage it manually. Any email that comes into a cluster acts as a reminder for the previous emails you might have missed, so as soon as a new email is received from that service or person, the cluster pops up to the top of your inbox.
Cons
Con Blue Mail collects a lot of private data and shares it with partners and affiliates
The privacy policy of Blue Mail informs that they "normally" don't store your password of your email provider. However, they do so with your emails, with the contacts from your address book or your unique android ID. They also evaluate your IP address.
Blue Mail reserves the right to share your data with their partners and affiliates. There is no further information about who these partners are.
Con Getting to be very slow
Used to be very fast, now getting slower and slower. No contact info for help. It might be caused by Blue Mail getting too full or by adding too many accounts or simply just bugs.