Hello Zuriel Sandoval,
Welcome to the Microsoft Q&A forum.
I understand how stressful it is when you can’t send or receive any emails, especially when you already tried purchasing additional storage and still need urgent access.
The Q&A Assist reply is a good starting point, especially the storage check. I would like to add a few Outlook.com and mobile-specific checks that usually pinpoint the cause faster:
1, Confirm whether the issue happens on Outlook.com web (this isolates account vs mobile app)
Sign in to Outlook.com in a browser and try to send a test email to yourself (or another address), then refresh to see if it arrives. If it also fails on the web, that points to an account-level restriction (storage/account status) rather than the iPhone app.
2, Re-check Microsoft cloud storage status (even after buying storage)
If Outlook.com mailbox storage or OneDrive/Microsoft storage is still over the limit, sending and receiving can stop. Please check your storage status from Outlook on the web, and once it shows you are no longer over the limit, try sending a test message and ask someone to send you a test message again.
Reference: Storage limits in Outlook.com - Microsoft Support
3, Check whether the account is temporarily restricted
Sometimes sending and receiving is blocked until the account passes a security check. Please sign in to the mailbox in a web browser and see if you are prompted to verify your identity, change your password, or unblock the account. Complete any prompts shown, then test sending and receiving again.
4, If web works but the iPhone app does not: reset the mobile sync partnership
If everything works on Outlook.com web but not on the phone, removing the mobile sync connection (device partnership) and then re-adding the account often resolves mobile-only sync issues.
Reference: Can't send or receive email in Outlook.com - Microsoft Support
To help narrow this down quickly, could you share: What message do you see when you try to send (for example, a storage notice, a blocked account notice, or a non-delivery message)? If you share a screenshot, please remove any personal information (full email address, phone number, or verification details) before posting. I hope this helps you get access to your emails again as soon as possible.
Please note that our forum is a public platform, and I modified your question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.
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