Postbox has steadily improved over the years and I feel it is the best email client in the market for an installed email application. Things I like:

* Handles an enormous amount of emails and searches them fast

* Easy to transfer between computers and backup/restore

* Supports multiple accounts including POP3 and SMTP

* Clean User Interface and great usability

* Highlighting rules to color message based on specific filters

* Auto-folder or delete messages based on a filter

* Quick reply within the body of the email

* Cross-platform - works great on Windows or Mac

* Autothreading

I initially tried it because my Outlook application was getting super slow and couldn't handle my email archive history. I gave Postbox a try and it had a nice import from Outlook function which made things seemless.

The support is good and they have been responsive anytime I have any issues. Review collected by and hosted on G2.com.

Things that I think could be improved:

* There is no calendar feature

* No tasks feature

* It can occasionally get confused about SMTP cloud email and not allow an undo of a delete to work properly Review collected by and hosted on G2.com.

Good clear interface and easy set up. Easy to use on day to day basis. Review collected by and hosted on G2.com.

Back up is non-existent and archiving is so poor it cleaned out my server without warning leaving me with a text file of incoming messages which is pretty useless as it also contains all the associated data needed for sending and receiving. Review collected by and hosted on G2.com.

Nothing. I hate this email client. But I have too many mails in the archive now and don't dare to switch to another client. I have big problems with their rude archiving function and cannot find back my mails all the time. I now use specific tags on the bottom of mails I sent so I can find them back! Review collected by and hosted on G2.com.

Very difficult interface. I cannot archive mails in folder structure which is what I want unless in a very tedious timeconsuming way. Now I have toput all mail into the archive. And this archive has the worst Search function ever. If I type the name of a person I mailed with or even the exact email address, I do NOT GET all the emails. I get only the ones he sent me. But not the ones I sent him !!! I frequently have trouble finding mails back. Important mails. Review collected by and hosted on G2.com.

For those who have worked with enterprise level Outlook on a PC and have been unhappy with Mail on Mac, this is a great option. One has the ability to have multiple email accounts running, create folders, create folders that reside only on your Mac, have different signatures, etc. Review collected by and hosted on G2.com.

When you use multiple email accounts and folders, it is not always easy to drag and drop email into a folder. However, you can right-click and move it anywhere, so not a huge problem. Review collected by and hosted on G2.com.

I have recently (within a few months) switched email applications from Mozilla Thunderbird to Postbox.

Initially, i favoured Thunderbird for the customization of the appearance of the program, being able to customize the skin/colours, made it easier for me to quickly identify the various parts to the email program.

Having used Postbox solely for the last while, It is easy to see how much more intuitive and powerful Postbox is, compared to Thunderbird.

I use exclusively Apple products (iPhone, iMac desktop at work, MacBook at work, iPad, etc) and Postbox is the perfect fit. It learns your 'junk' settings and has so many more features to increase productivity. Review collected by and hosted on G2.com.

I would prefer to have a little more customization in the appearance of PostBox - it's a minor 'dislike', and by no way will it influence my decision to continue using, but having more customization and 'add on' features would be much appreciated :) Review collected by and hosted on G2.com.

Everything in Postbox just works, and it's way easier to set up. I have absolutely no issues separating my mail or setting up custom signatures. Review collected by and hosted on G2.com.

Sometimes Postbox has issues with Security Certificate Exemptions if the email domain isn't registered to the exact name it displays. Review collected by and hosted on G2.com.

Ability to manage several email accounts Review collected by and hosted on G2.com.

HTML rendering is behind other email clients Review collected by and hosted on G2.com.

The ability to manage numerous email accounts on different settings with no delay in sync. Review collected by and hosted on G2.com.

Picture manipulation within messages is still not as good as native Mac apps (eg. drag and drop from other apps) and also search is also not conclusive. Review collected by and hosted on G2.com.

I use it everyday, the interface is good, it has a lot of options which I do not use but so far is a very decent email client for Mac. Review collected by and hosted on G2.com.

It is an expensive license and slow sending emails. Review collected by and hosted on G2.com.

It's full-featured without being bloated. I find it to be intuitive, speedy, and powerful enough for fairly heavy usage. Review collected by and hosted on G2.com.

I would like to see a better template system for stock responses, and the spam filtering sometimes catches too many legitimate emails. Review collected by and hosted on G2.com.