I'm getting 100 plus junk mails a day,

Blocking more senders will not stop this flood because Outlook.com’s block feature moves their messages to Junk Email rather than preventing delivery. ^1^

Take these next steps

1. Protect legitimate mail first
   • In Outlook.com, open Settings → Mail → Junk email.
   • Under Safe senders and domains, add important addresses or domains such as your bank, delivery services, stores, and regular contacts.
   • Select Save. Messages from these entries should not be sent to Junk. ^2^
2. Create rules for recurring spam patterns
   • Go to Settings → Mail → Rules → Add new rule.
   • Use a narrowly defined condition, such as:
     • An exact recurring subject phrase
     • Repeated wording
     • A domain that repeatedly appears
   • Choose Delete or move the message to a separate folder.
   • Add exceptions for trusted senders when necessary.
   Avoid broad rules based on common words such as “order,” “account,” or “delivery,” because they may also remove legitimate messages. Rules work best when the unwanted messages share a stable characteristic; individual sender rules are ineffective when spammers continually change addresses. ^3^
3. Report phishing, but do not interact with it
   • Select suspicious messages and choose Report → Report phishing.
   • Do not reply, open attachments, click links, or use an unsubscribe link in obviously fraudulent mail.
   Reporting helps improve filtering, but it does not itself block future messages from that sender. ^4^
4. Let Outlook.com clear the Junk folder Messages in Outlook.com’s Junk folder are automatically deleted between 10 and 30 days after arrival. Check it periodically for legitimate mail and mark any valid message as It’s not junk before deletion. ^5^

If the volume remains unmanageable

Consider creating an Outlook.com alias for future trusted accounts and subscriptions while retaining the current address for existing mail. Do not casually remove an @outlook.com, @hotmail.com, @live.com, or @msn.com alias: removing a Microsoft-domain alias permanently deletes it and it cannot be associated with a Microsoft account again. ^3^

Then contact Outlook.com support from the affected account:

1. In Outlook.com, select Help.
2. Enter a description of the junk-mail problem.
3. If self-help does not resolve it, scroll to Still need help?
4. Select Yes and submit the request. ^6^

Receiving junk alone does not establish that the account was compromised. However, if you also notice sent messages, forwarding rules, profile changes, or successful sign-ins you do not recognize, review the Microsoft account’s Recent activity. For unfamiliar activity, select This wasn’t me or Secure your account, then change the password and update the security settings. ^7^

References

1. Block a mail sender
2. Safe Senders in Outlook.com | Microsoft Support
3. Receiving 200 junk emails a day...make it stop please! - Microsoft Q&A
4. Phishing and suspicious behavior in Outlook | Microsoft Support
5. Mail goes to the Junk folder by mistake | Microsoft Support
6. Email is missing from your Outlook.com inbox | Microsoft Support
7. Check the recent sign-in activity for your Microsoft account