Why is Outlook not sending or receiving email?

Straight answers for Volusia County homes and small businesses, written in plain language.

Outlook problems often come from the account, not the Outlook window itself. The first question is whether the mailbox works in a web browser.

Here are the most common things to look at before you start changing a lot of settings.

Common causes

The password or sign-in token changed.
Outlook is in Work Offline mode.
The mailbox is full or the internet connection is unstable.
The Outlook profile or Microsoft 365 account is damaged or mixed with another account.

Try the mailbox in webmail first.
Look for a clear send/receive error message.
Make sure Outlook is not set to Work Offline.
Do not remove the account until you know whether important mail is stored only on the computer.

Get help if business email is down, Outlook keeps asking for a password, folders are missing, or the account works online but not in Outlook.

We can check Outlook, Microsoft 365, custom-domain mail, DNS, and the local computer setup when those pieces are connected.

Write down what happened, what changed, and any error message you see. That gives us a better starting point and keeps the repair focused.