Windows 10: blocked email

Suddenly my mail attachments I have sent to myself say (prohibited file type) these same attachments have always worked fine.they are grayed out also.What can I do

:)

 

Unable to block a sender, keep getting emails

Original title: Blocking Sender

I've tried all of the usual ways to block a sender but my email won't let me block this and I get several emails a day from:
L: *** Email address is removed for privacy ***? because it's not a valid domain name. HELP!!! I've changed my password, blocked every one of this person's emails that come into my mailbox but can't add it to my block senders
list.

 

Blocking unwanted emails from senders that I do not know in Outlook mail

I have been blocking unwanted emails from senders that I do not know. Their email addresses are on file and I do not receive emails from from their websites anymore.

However, these senders are now using my name and email address in sending me these emails and I can not block them because Outlook will not let me block my own email address.

Therefore the only thing I can do is delete them. Is there another alternative to rid myself of this problem?

How can they send me messages using my email address to me?

Original title: Blocking emails

 

Who is blocking this your email or your isp as a lot of isps prohibit .exe etc

 

its a hotmail account