That is so true, but for gmail/hotmail try that:
Gmail:
https://support.google.com/mail/answer/81126?hl=en
Hotmail (register as sender):
And a good spamtest:
Gmail:
https://support.google.com/mail/answer/81126?hl=en
Hotmail (register as sender):
And a good spamtest:
Google, Microsoft really are the destroyers of the internet.