I wiped and reset my phone recently, and apparently IBM has upped the security requirements to sign into Slack since I first set it up: now I can't sign in on my phone for an undisclosed reason. (Probably because its rooted, I know that's why I'm not allowed to have my work email on my phone.)
It's been kind of nice, honestly.
[0]http://support.mail-wise.com/knowledgebase/articles/391797-w...
Giving your company (or anyone) total access to your personal phone is insane. Your phone, with access to your email, is effectively a master key to your life. Through it, they have the ability to do almost anything to you (reset your bank password and take all your money, etc).
If you hunt around enough though you can find the parameters needed to use IMAP.
On the contrary you can disable other rules - like enforcement of PIN (if you know how) if you have a rooted phone.
[0]https://developer.android.com/training/safetynet/index.html
I'm fine with not doing so as I don't want bigco's email on my phone, it's super spammy. It's more of a todo list than actual communications, forever base lining permissions.
* POP/IMAP/webmail/etc. Obviously the incomming SMTP server is publicly accessible, but that doesn't help me.