
A Mailto link is a simple way to make it easy for users to send an email to you or your website. It's created using the "mailto:" prefix followed by the email address.
To make your Mailto link more user-friendly, you can specify the email subject and body using the "subject" and "body" parameters. For example, a Mailto link with a subject and body might look like this: mailto:[email protected]?subject=Hello&body=Hi%20there!.
Using the "mailto:" prefix is a standard way to create a Mailto link, and it's supported by most email clients and devices.
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What Is Mailto?
A mailto link is a type of HTML hyperlink that launches the user's default email client with a new message window when clicked. This link type streamlines the email-sending process on websites, encouraging more visitors to reach out with questions, feedback, or business inquiries.
A basic HTML mailto link uses the simple HTML format: "Send us an email." This creates a clickable link that opens an email draft to [email protected] when selected.
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Mailto links excel at pre-populating email fields automatically, filling in the recipient's address, subject line, and including default text in the message body. This automation benefits senders and recipients by ensuring accurate email addresses and providing context in every message.
The process of clicking a mailto link triggers the computer to recognize the "mailto:" protocol, which then launches the default email client, showing a new mail window where you can generate a message.
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What Is Mailto?
A mailto link is a specialized HTML hyperlink that launches the user's default email client with a new message window when clicked.
It's like your business email client opening when you click an email address in a document. The process involves several technical steps happening behind the scenes.
The basic HTML mailto link uses a simple HTML format: Send us an email. This creates a clickable link that opens an email draft to [email protected] when selected.
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Mailto links work with various email clients like Microsoft Outlook, Apple Mail, Gmail, or whatever program serves as the user's default mail app.
The "mailto:" protocol is recognized by the computer, which then launches the default email client, showing a new mail window where you can generate a message.
Mailto links excel at pre-populating email fields automatically, filling in the recipient's address, subject line, and including default text in the message body.
Here's a breakdown of the technical steps involved:
- Protocol recognition: The browser identifies the "mailto:" protocol and knows to trigger an email action.
- Client detection: The system checks for the default email client setting.
- Data parsing: The browser breaks down the mailto link components (recipient, subject, body) and formats them according to email standards.
- Client launch: The system launches the email client if it's not already running, passing along the parsed information.
- Field population: The email client receives the data and fills in the appropriate fields in a new message window.
You can also use mailto links to send emails to multiple recipients by inserting their addresses separated with commas.
Mailto Parameters
You can create comprehensive mailto links with several options by combining multiple parameters. This allows you to match your specific communication needs.
For example, you can add a subject line to automatically add a text in the subject field by inserting it after the ‘subject’ parameter, separated by “?” if it's the first parameter, and “&” for further parameters.
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To separate words in the subject line, use the ‘%20’ tag. This helps ensure that the subject line is correctly formatted across different email clients and browsers.
You can also omit the ‘To’ field by using the following construction: mailto:emailaddress?subject=Your%20Subject. This is useful when you want to create a link that allows users to spread the news about a giveaway or promotion.
If you use this construction and your clients have a native app set up as a default email client, nothing will change. However, if they have a web-based client like Gmail, using the target=”_blank” parameter will cause the email client to open in a new tab.
You can also add CC and BCC recipients by comma separating them in the href value. For example, mailto:[email protected],[email protected][email protected][email protected].
Here are some examples of mailto parameters:
You can use these parameters to create increasingly sophisticated mailto links that match your specific communication needs.
Mailto Best Practices

Mailto links can be a double-edged sword. On one hand, they're easy to create and can be a convenient way to share your contact information with visitors. On the other hand, they can be easily harvested by bots and spam filters may not be able to catch them.
To avoid spam, consider using contact forms as your primary communication channel and reserving mailto links for logged-in users or specific, high-value pages. This way, you can protect your email address from automated harvesting tools.
Here are some key limitations to consider when implementing mailto links:
- Email client dependency: Many users rely on webmail services, so provide an alternative contact form or include direct links to web-based email composition.
- Accessibility challenges: Use clear, descriptive anchor text and include proper ARIA labels in your HTML markup to clarify the link's purpose.
- Mobile device variations: Test your mailto links across various devices and offer a mobile-responsive contact form as a backup.
- Limited tracking capabilities: Mailto links don't provide a built-in way to track successful email compositions or sends.
Why It Fails
Mailto links can be a convenient way for users to contact you, but they often fail to deliver. This is because most users don't have their default email client set to the actual client they use to send emails, such as Gmail or Outlook.
For example, they might have Gmail set as their default client, but still use Outlook to send emails. If you include a mailto link with their email address, it will load the Gmail client instead, which can be annoying for the user.
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Mailto links are also easily harvestable by bots, which can collect email addresses within milliseconds. This can lead to a wave of unwanted messages in your inbox. You can try to obfuscate the address with JavaScript or other methods, but it may not be worth the effort, especially with spam filters in place.
If you're concerned about security, you can use contact forms for primary communication channels and reserve mailto links for logged-in users or specific, high-value pages.
Is This the Right Way?
Mailto links are easy to harvest by bots, which can lead to unwanted messages in your inbox. They can also share your contact details with legitimate outreach specialists.
It's worth noting that mailto links are not the most secure way to share email addresses. With excellent spam filters in place, it may not be worth the effort to obfuscate the address.
If you're concerned about mailto links, consider changing the default mailto behavior in your system or browser settings. This can help ensure that mailto links open with the client of your choice.

Here are some steps to change the default mailto behavior:
By following these steps, you can ensure that mailto links open with the client of your choice, and reduce the risk of unwanted messages in your inbox.
Test on Multiple Platforms
Test on Multiple Platforms is crucial to ensure a smooth mailto experience. You should check your mailto links on different browsers like Chrome, Firefox, Safari, and Edge.
This comprehensive testing will help you identify any unexpected behavior that could frustrate users. It's essential to test on various operating systems such as Windows, macOS, iOS, and Android.
Pre-written message content should be kept brief and helpful, rather than lengthy and restrictive. This allows users to add their own context while still providing necessary information.
Mailto Examples and Use Cases
Mailto links can be used within an HTML document to generate a link for sending email, and clicking on the hyperlink automatically opens the default email client with the destination email address pre-filled.
You can specify initial values for headers like subject, cc, and message body in the URL, but blanks, carriage returns, and linefeeds must be percent-encoded. This is useful for creating links like "Submit proposal" that pre-fills the subject line and includes additional email addresses.
Mailto links serve multiple purposes, such as connecting customers with service or sales teams, and freelancers and professionals can add them to portfolios for project discussions. News websites use them for tip submissions and feedback, while non-profit organizations handle donation inquiries and volunteer sign-ups.
For another approach, see: List of Email Subject Abbreviations
Examples
Clicking on a "mailto" link automatically opens the default email client with the destination email address pre-filled.
You can specify initial values for headers like subject and cc in the URL. For example, you can pre-fill the subject line with a specific message.
Blanks, carriage returns, and linefeeds in the URL must be percent-encoded, meaning they need to be replaced with special codes to work properly.
You can specify multiple email addresses in the "mailto" link, separated by commas.
Use Cases for Links
Mailto links are incredibly versatile and can be used in a variety of situations to make it easy for visitors to contact you. They're particularly effective when time matters, such as on e-commerce sites where customer support is just a click away.
Company contact pages use mailto links to connect customers with service or sales teams, making it easy for people to reach out with questions or concerns. Freelancers and professionals add them to their portfolios for project discussions.
News websites implement mailto links for tip submissions and feedback, while non-profit organizations use them for donation inquiries and volunteer sign-ups. Online retailers integrate mailto links throughout their customer service sections to help support teams prioritize and respond to customer inquiries more effectively.
Here are some common use cases for mailto links:
By using mailto links, you can create a seamless communication experience for your visitors, making it easy for them to get in touch with you.
Key Concepts and Takeaways
Mailto links are a game-changer for website communication. They turn email addresses into clickable elements that automatically open email clients, streamlining communication and improving user engagement.
Creating effective mailto links requires minimal technical skills, but they offer powerful features like pre-filled subject lines, message bodies, and multiple recipient options. This makes it easy to customize the email experience for your visitors.
To ensure all visitors can reach you easily, it's essential to offer alternative contact methods. Mailto links depend on configured email clients, so having a backup plan in place is crucial.
Testing mailto links across different platforms is a must to maintain accessibility and proper functionality for all users. Using clear, descriptive link text also helps with this.
Here are some key benefits of using mailto links:
- Streamline website communication
- Improve user engagement
- Offer powerful features like pre-filled subject lines and message bodies
- Ensure all visitors can reach you easily
Frequently Asked Questions
Does mailto still work?
Yes, mailto is still widely used and supported, allowing users to send emails directly from web pages. Despite its age, it remains a simple and effective way to initiate email communication.
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