I have used 4 browsers: firefox(in safe mode), chrome,opera,safari. I tried tor for android.
I tried from 2 different pc and 2 mobile phones.xiaomi and samsung.with the default browses they had plus chrome.

2 years ago i had a similar issue with Blockchain wallet (browser wallet only, android app was working).Their system didn't sent an email to authorize my browser and give access to my wallet.I tried with a lot browsers.Their "technical" team didn't now where was the issue.they told me that the problem was mine.
After that i created a second account to Blockchain wallet and test it.My new wallet was sending me the email normally but my old not.I never understand how could i have the problem since the second account was working normally.

 I could try the same with fortunejoke but maybe they accuse me for multi account.