Email and text will not update away from hotel

[AC Question]

Greetings All,

Samsung Note 3
Android Version: 5.0
Kernel: 3.4.0-4335446
Build: LRX21v.900AUCUE0c2
KNOX3.0

I use my Note 3 in the U.S. (ATT 4G) and in The Netherlands (Lebara 4G). For about 4 weeks now (in Amsterdam), my Note 3 will update email and text ONLY at the hotel (on hotel Wi-Fi). All other Apps (news apps, Facebook, Clash of Clans, etc.) will update everywhere. My email (gMail, Yahoo, Microsoft exchange) and texts (primarily WhatsApp) will only update when I am connected to the hotel WiFi.

Any ideas why my email and texts seem to be connected to the hotel Wi-Fi?

Thanks in advance and looking forward to your ideas.