Send & Receive Issues

How to Fix a Greyed-Out Send Button in Outlook for Mac

Amos Gikunda Oct 8, 2026 869 views

Question details

The user is unable to send emails in Outlook for Mac because the Send button is unresponsive and greyed out.

How to Fix a Greyed-Out Send Button in Outlook for Mac

Product: Microsoft Outlook
Device & OS: Mac
Scenario: Attempting to send an outbound email message using the Microsoft Outlook desktop application on macOS.
Observed behavior: The Send button is greyed out and unclickable, preventing outbound emails. This issue is typically caused by a damaged profile, incorrect account configurations, or a specific mailbox error.

Before you start

Ensure your Mac is connected to a stable internet network and verify that Outlook is not running in 'Work Offline' mode, as this will automatically disable the ability to send emails.

Solution 1

Test Your Email Account Using Outlook on the Web

Use this method to quickly determine whether the sending failure is an issue with the local Mac application or if it affects the email account on the server side.

Log in to Webmail

Open your preferred web browser and sign in to Outlook on the web or your email provider's webmail portal.

Send a Test Message

Compose a new email and attempt to send it. If the email sends successfully online, the issue is isolated to your Outlook for Mac application.

Solution 2Recommended

Create a New Outlook Profile via Profile Manager

This solution resolves the issue by bypassing corrupted application data, forcing Outlook to create a fresh connection to your mailbox.

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Frequently Asked Questions

Why is the Send button disabled only for one specific email account on my Mac?

This usually indicates an issue with the SMTP (Outgoing Mail) server settings for that specific account. It could also mean the specific mailbox requires re-authentication. Check your account settings to ensure the correct outgoing server port and encryption methods are selected.

Will creating a new Outlook profile delete my existing emails or contacts?

No, creating a new profile does not delete your old data. Your previous profile and its locally cached emails are preserved on your hard drive. Creating a new profile simply helps you bypass corruption in the current one.

How do I switch back to my previous Outlook profile if the new one doesn't work?

Navigate back to Applications > Microsoft Outlook > Show Package Contents > Contents > SharedSupport and launch the Outlook Profile Manager. Select your old profile from the list, click the gear icon at the bottom, and choose 'Set as Default', then restart Outlook.

Outlook & Email Problems