[mstaoru]

I have 6 mailboxes I prefer to keep separate, and my email client history goes from Thunderbird to Postbox, then Thunderbird again, and then Spark.

Thunderbird was a good mail client, but the search is seriously broken. It's almost impossible to search Chinese at all, and when it searches Russian, some weird hits get mixed in, and some proper hits get ignored.

Postbox was very good overall, but every once in a while it would lose the whole cache, index, and sometimes even the whole downloaded history, and would spend a day chugging at downloading everything over again.

So for the last half a year I've been using Spark, and I'm pleasantly surprised by speed, search, and the feel of the app. Admittedly, there is no Windows version so it's not truly cross-platform.