[stkni]

I don't think this is that surprising. A lot of those firms would already have large-ish engineering teams already but managing the complexity of the mail servers is just not a good use of that resource.

Mail is a mostly solved technical problem, and having 'better' mail servers than the next guy isn't going to put food on the table any more.

[gadders]

Mail is a commodity now. It would be like trying to program your own switchboard or run your own phone lines,

[darkr]

> It would be like trying to program your own switchboard or run your own phone lines

You mean like a PBX? Most companies with >= 50 employees do this. Smaller/newer ones will definitely tend towards a managed service for this though.

[Tepix]

What's that complexity that you are implying?