Using Outlook for Android for personal email and calendar management
Hi Kristine,
Thank you for sharing your question. I understand how stressful it is when you can't send emails and think your account might be hacked. Here's what to do ASAP,
Reason: If you can't send stuff, Microsoft might've blocked your account due to dodgy activity, or a hacker might be sending spam from it.
Head to Microsoft Account Security and swap your password for a strong, fresh one.
Look over your Recent Activity for any weird logins or edits you don't recognize.
Turn on Two-Step Verification to lock down your account.
If things look fishy, use the Microsoft Account Recovery Form or hit up Microsoft Support to prove who you are and get your account back.
Scan your devices with antivirus software to be sure they're clean.
I hope this helps.
Best Regards,
Noel