Adding a professional signature in Outlook is an essential step for email communication. A signature represents your brand, conveys contact information, and leaves a lasting impression on recipients. Whether you are a professional, entrepreneur, or student, knowing how to add signature in Outlook ensures that every email you send maintains consistency, professionalism, and credibility.
Microsoft Outlook provides multiple platforms for creating and adding signatures, including Outlook 365, Outlook app on desktop, Outlook on iPhone, and Outlook on Mac. Each platform has unique features and steps for setting up a signature. This article provides detailed, step-by-step instructions to help you create and manage signatures across all Outlook platforms. By the end of this guide, you will be able to design visually appealing, functional, and consistent email signatures across devices.
How to Add Signature in Outlook 365

Outlook 365 is a cloud-based version of Outlook, commonly used in corporate environments and by professionals. Adding a signature in Outlook 365 ensures that all emails sent from your account carry your branding and contact details.
Key Points Explained
• Accessing signature settings
Open Outlook 365 in your browser, go to “Settings,” and select “View all Outlook settings.” Navigate to “Mail” → “Compose and reply” to access signature options. This centralized location makes it easy to manage your signatures.
• Creating a new signature
Click “New” to create a new signature. Give it a descriptive name, such as “Professional Signature” or “Marketing Signature,” to identify it easily when managing multiple signatures.
• Formatting your signature
Outlook 365 provides a rich text editor to format your signature. You can change fonts, colors, sizes, add bold or italics, and insert hyperlinks. Proper formatting ensures readability and professional appeal.
• Adding images or logos
You can add your company logo or personal image by clicking the image icon. Ensure images are appropriately sized to prevent distortion and excessive file size.
• Setting default signatures
Assign your new signature as default for new emails and replies/forwards. This ensures that all outgoing emails automatically include your signature without manual insertion.
• Previewing and saving
Always preview your signature to verify alignment, spacing, and links. Once satisfied, click “Save” to apply the signature to your Outlook 365 account permanently.
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How to Add Signature in Outlook App

The Outlook desktop app provides similar signature functionality to Outlook 365 but with slight differences in menu layout and options. Creating a signature in the app allows you to maintain consistency across all emails sent from your computer.
Key Points Explained
• Accessing signature settings
In the Outlook app, go to “File” → “Options” → “Mail” → “Signatures.” This menu allows you to create, edit, or delete email signatures.
• Creating a new signature
Click “New” to create a signature. Assign it a clear name for easy identification, especially if you plan to use multiple signatures for different purposes.
• Formatting text and layout
Use the formatting toolbar to adjust font styles, colors, and sizes. Proper formatting ensures your signature looks professional and is easy to read on all devices.
• Inserting images, links, and social icons
Add logos, social media icons, or clickable links using the insert options. Make sure images are optimized for quick loading and do not overwhelm the recipient’s inbox.
• Assigning default signature settings
Set your signature as the default for new emails and replies. This reduces the chance of sending emails without a signature.
• Testing your signature
Send a test email to yourself to verify appearance and functionality. Check image display, link accuracy, and spacing to ensure a professional look.
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How to Add Signature in Outlook on iPhone

Many users rely on mobile devices for email communication. Adding a signature in Outlook on iPhone ensures your emails maintain a professional appearance even when sent from your mobile device.
Key Points Explained
• Accessing signature settings in the app
Open the Outlook app on your iPhone, tap your profile icon, go to “Settings” → “Mail” → “Signature.” This streamlined menu makes signature management straightforward.
• Creating or editing a signature
Tap the signature field to create a new signature or edit an existing one. Mobile-friendly signatures should be concise and readable on small screens.
• Formatting limitations
Unlike desktop versions, formatting options are limited. Focus on plain text, line breaks, and essential information. Avoid excessive images or large logos, which may display incorrectly on mobile devices.
• Adding essential details
Include your name, title, company, contact number, and website. Mobile recipients often view emails on small screens, so prioritize key information.
• Setting as default signature
Outlook for iPhone automatically applies the signature to all outgoing emails. Ensure the signature is concise to avoid long mobile emails.
• Testing and adjustments
Send a test email to verify readability on different devices. Adjust line spacing and text formatting as necessary for optimal display.
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How to Add Signature in Outlook Mac

Outlook for Mac provides a similar experience to the Windows desktop app, but with Mac-specific menu layouts and design elements. Adding a signature on Mac ensures continuity for professionals using Apple devices.
Key Points Explained
• Accessing signature settings
Open Outlook for Mac, go to “Preferences” → “Signatures.” This menu allows you to create new signatures or manage existing ones.
• Creating a new signature
Click “+” to add a new signature. Assign a descriptive name to keep your signatures organized, especially if multiple signatures are needed.
• Formatting and styling
Use rich text formatting to adjust fonts, colors, and sizes. Mac users can also include special characters and Unicode symbols for branding purposes.
• Adding images and logos
Drag and drop images or use the insert menu to include your logo. Ensure images are correctly sized and compatible with Mac and Windows users.
• Assigning default signatures
Set your signature as default for new messages, replies, and forwards. This ensures all emails consistently display your branding.
• Testing signature appearance
Send test emails to verify correct formatting, image display, and link functionality across multiple devices and email clients.
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Conclusion
Learning how to add signature in Outlook is crucial for professional email communication. Whether you use Outlook 365, desktop app, iPhone, or Mac, creating a consistent and visually appealing signature enhances credibility, ensures contact information is always visible, and strengthens personal or corporate branding. By following these step-by-step instructions and best practices, you can create polished signatures that maintain professionalism across all devices and platforms.
FAQs
Can I use images in my Outlook signature?
Yes, images and logos can be included, but ensure they are optimized for size and visibility.
Will my signature appear on all devices automatically?
Desktop and web versions may sync with your Microsoft account, but mobile apps often require separate signature setup.
Can I create multiple signatures in Outlook?
Yes, both desktop and web versions allow multiple signatures for different purposes.
Does Outlook support social media links in signatures?
Yes, you can add clickable social media icons or hyperlinks to your signature
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