Ever since Hotmail switched to Outlook I have been having technical issues with it.
Recently, I sent a couple of emails to a friend of mine, and for some bizarre reason they were delivered to a different, and completely unknown to me email address.
Strangely enough, the person who received my emails, happens to know my friend, and forwarded the emails to her, but the point is that this should not be happening. When I send an email to someone, I expect them to receive that email; I certainly don't want it to go to a complete stranger.

Also, I noticed that messages from two completely unrelated people are often linked together in one chain. Again, this shouldn't be happening.

Why is this happening, and how can I go on trusting Hotmail/Outlook with my account when such grave mistakes occur?