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Full user review
"Disappoints in actual use"
Organise mails by thread.
Some useful features for search when a message is open.
Downloads email twice when using pop mail with MS Exchange server.
I tried out the software in actual use conditions (i.e., with a lot of email).
In real use, Postbox disappoints:
(1) This is a real memory hog when used with large mailboxes (RAM allocation grows to 250+ megabytes)
(2) The search feature is slow in large mailboxes.
(3) The search feature does not remember the last option used (unlike Thunderbird). I mostly search subject or sender. Postbox does not remember this as default.
(4) And finally, the most important. When used with Microsoft Exchange server in pop mode for offline use with a laptop, Postbox downloads every mail exactly twice. This has to do with Message ID being changed with first download.
When you contact their support to fix this, they are at first helpful, but when they discover that they cannot fix the problem, they simply fade away and no longer respond to your queries.
There are also many other problems, including inability to set defaults for message delete actions (go to the next message below instead of above, as most people read their emails from top down).
In all, I tried and was disappointed. Would not recommend to others. Software is potentially great, but a new entrant really cannot afford to treat users as arrogantly as this.
In addition, the memory problem is real when it should not be.
Like any software using MS Outlook style file format, this too creates excessively large mailbox files and does not offer the option to automatically detach attachments from messages and store them in a separate folder.