Where to find the default font setting in Outlook
The steps to change your default font depend on which version of Outlook you use. On Windows, open Outlook and go to File > Options > Mail. On the left side, select Stationery and Fonts. On Mac, the path is Outlook > Preferences > Composing > Fonts. Both routes lead to the same choice: you pick a font, size, and color that Outlook will use for every new message you write.
If you use Outlook on the web (the browser version), the process is simpler. Click the gear icon in the top right, then View all Outlook settings > Mail > Compose and reply. Scroll down to find the default font options. The web version offers fewer font choices than the desktop app, but the setting works the same way.
Key Takeaways
- Windows Outlook users change the default font in File > Options > Mail > Stationery and Fonts.
- Mac users find the setting under Outlook > Preferences > Composing > Fonts.
- Outlook on the web has a simpler interface: go to settings, then Mail, then Compose and reply.
- Your choice applies only to new messages you write, not to messages you receive or reply to.
- You can set a different font for replies and forwarded messages separately from new messages.
What happens when you change the default font
When you set a new default font, Outlook uses it for every new message you compose from that point forward. The change does not affect messages you have already written or received. If you reply to or forward an existing message, Outlook will use your new default font for the text you add, but the original message keeps its original formatting.
Some fonts display differently on different devices. A font that looks clean on your Windows computer might render differently on a recipient's phone or Mac. Stick to common fonts like Calibri, Arial, or Times New Roman if you need your messages to look the same for everyone who reads them.
Setting separate fonts for replies and new messages
Outlook lets you use one font for new messages and a different font for replies and forwards. In the Stationery and Fonts window (Windows) or Fonts preferences (Mac), you will see separate sections for "New Mail" and "Replying or Forwarding". Many people use a more formal font for new messages and a simpler one for quick replies.
This separation is useful if you send formal emails to clients or managers but want something more casual for internal team conversations. Set each one independently, and Outlook will remember both choices.
Why your font choice might not show up for recipients
If you send a message in HTML format (the default in most Outlook setups), your font choice travels with the message and recipients see what you chose. If you send in plain text format, Outlook strips out all formatting, including your font, and recipients see whatever font their own email client uses by default.
Check your format before sending important messages. In Windows Outlook, go to File > Options > Mail > Compose Messages and look for "Compose messages in this format". If it is set to "Plain Text", your font choice will not appear to recipients. Switch to "HTML" if you want your formatting to show up.
Changing fonts for specific messages only
You do not have to use your default font for every message. When you are composing a message, highlight the text you want to change, then use the font dropdown in the toolbar to pick a different one. This one-time change does not affect your default setting — the next message you write will use your default font again.
This is useful when you need to match a specific style for one email or want to emphasize part of a message. The toolbar font selector is the fastest way to make a quick change without going back to settings.
Troubleshooting when the default font does not change
If you set a new default font but Outlook keeps using the old one, restart the application. Outlook sometimes caches the old setting in memory and does not pick up the change until you close and reopen it completely.
If restarting does not work, check whether you are in the right settings menu. Outlook has multiple places where fonts can be set, and changing the wrong one will not affect your compose window. Make sure you are in Stationery and Fonts (Windows) or the Composing preferences (Mac), not in the signature settings or other areas. If you use Outlook on the web, clear your browser cache and reload the page.
Font size and readability
The default font size in Outlook is usually 11 points, which works for most recipients. Anything smaller than 10 points becomes hard to read on phones, and anything larger than 14 points can look unprofessional in business emails. If you change the size, 12 points is a safe middle ground that looks clean and stays readable on all devices.
Some people increase the font size as they get older or if they have vision concerns. Outlook remembers whatever size you choose, so you can set it once and not think about it again.
Frequently Asked Questions
Can I use different default fonts for different email accounts?
Yes, if you have multiple accounts set up in Outlook. Each account can have its own default font. When you compose a new message, Outlook uses the font you set for that specific account. Go to the account settings in Stationery and Fonts and make sure you are editing the right account before you change the font.
What if my default font is not available on the recipient's computer?
Outlook embeds the font information in HTML messages, so recipients see your chosen font even if they do not have it installed. If they do not have the font, their email client substitutes a similar one automatically. Stick to widely available fonts like Arial, Calibri, or Georgia to minimize the chance of a noticeable substitution.
Does changing the default font affect my signature?
No. Your signature has its own font setting, separate from your compose font. If you want your signature to match your message font, you need to edit the signature separately. Go to File > Options > Mail > Signatures and change the font there.
Can I change the font for received messages?
No, you cannot change how received messages display in your inbox. You can only change the font for messages you write. If you want to read received messages in a larger or different font, adjust your reading pane font in the View settings instead.
Why does my font look different when I send the message?
The font may look slightly different depending on the recipient's screen resolution, device type, or email client. What looks perfect on your monitor might render slightly differently on a phone. This is normal and not a problem with your Outlook settings.