Mail application for OS 10.9

Try Airmail. Its a solid mail client

 

Thunderbird is a good one to keep around. I used it to migrate from my 10 year old Windows Eudora mail folders to something more modern. TB was able to import from those old files and allow me to have over 10 years of fully searchable mail at my disposal. And once it was over, I was able to walk away from TB until the next time I decide I need it. I've used mostly mail.app ever since... Until Mavericks that is...

When I went looking for something to replace the severely dumbed-down mail.app that comes with Mavericks, I found Airmail to be a solid replacement. It retains the capability of replying to any email as the person it was addressed to. It retains the ability to log in as one thing but reply as something else so I'm not spreading iCloud or gmail addresses to my friends when I'd really rather have them use something else.

Airmail is much faster than mail.app. It's much more capable. It understands that pdf files are not images to be displayed in the body of a message. Airmail is willing to let me set up email accounts within the app rather than send me to system preferences to set up my email as if I was on iOS or Windows or something. The only thing I find missing from Airmail is "mark all as read." Oh well, for two bucks I can live without that one feature.

 

You don't like the UI of Mac Mail but you like iOS's Mail? Do you know that the UI of Mac Mail was brought over from the iOS version?

Anyway, I use Mail, but I would recommend Thunderbird if you don't like it.

 

You could try MS outlook. It has the most features of any email client out there. Apple mail sounds fine for your needs though.