I just arrived last night to the USA from overseas (not Europe) after being away for ~ 3 months. I sent numerous emails, some with attachments, and it was hit or miss. Though I tried different internet services many times over my three USA devices it was impossible at times. The emails did not go through to the addressee or shows up as a Bcc or CC to myself. I've come back to a big mess that I am scrambling to clean up and not miss deadlines. The Internet cafe's where I was had 56" screens that shared my emails with the whole town. Many times I could get emails on my personal devices, but could not successfully send them. What did work most often was iMessaging when Internet did not work properly. I'm lucky my kid was able to get my rental car info changed and send me details through iMessage.

Hang in there SP. Not all systems or devices are created equally when it comes to technology.