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Expanding the Mailto: tag


The Mailto tag is used as a way to include an email address on a web page which can be clicked on thus opening the visitors default email client with the email address pre-filled. The mailto code can e expanded to include multiple email addresses, email addresses to CC and BCC, the email subject and even a message body.

Mailto: Tag

The following is the basic mailto tag:

<a href=”mailto:name@abc.com”>Mailme!</a>

Which would result in: Mailme!

Adding multiple recipients:

TO add multiple mail addresses just add in more addresses after the first address separated by a comma:

<a href=”mailto:name@abc.com, first@second.com,you@there.com”>Mailme!</a>

Which results in the following, if you feel like clicking it:Mailme!

Adding emails to Carbon copy (CC) or blind carbon copy (BCC):

Adding recipients to copy the emails to just add cc= or bcc=after the email address.

<a href=”mailto:name@abc.com?cc=me@here.com”>Mail and CC!</a>
<a href=”mailto:name@abc.com?bcc=john@example.com”>Mail and BCC!</a>

Which result in Mail and CC!, Mail and

You should note at this point that we needed to insert a “?” before the CC and BCC ‘functions’. This is always the case even if you add a subject or message body here. The first ‘function’ after the main email addresses must start with a “?” while any extra ‘functions’ will start with a “&”

If we combine the previous examples this will become clearer:

<a href=”mailto:name@abc.com?cc=me@here.com&bcc=john@example.com”> CC&BCC</a>
<a href=”mailto:name@abc.com?bcc=me@here.com&cc=john@example.com”> BCC&CC</a>

Result: CC & BCC

Adding a subject:

To add a subject simple add “subject=” :

<a href=”mailto:name@abc.com?subject=feedback”>

Result: Mail & subject

Adding a message body:

To add a subject simple add “body=” :

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<a href=”mailto:name@abc.com?body=message”>

Result: Mail & body

If you would like to add an extra line to the body of the email you must add %0A where ever you want the text to break to a new line.

<a href=”mailto:name@abc.com?body=message%0Ahere”> Mail & body</a>

Result: Mail & body

Combining these…

We can combine the previous examples to make a comprehensive mailto link:

<a href=”mailto:name@abc.com,john@example.com?cc=sales@here.com& bcc=admin@there.com&subject=Complaint& body=Dear sir.%0AI have a complaint to make”>Mail us!</a>

Result: Mail us!

Important notes:

  1. You are limited to 255 characters in your mailto link.
  2. Including email addresses in this way leave them vulnerable to harvesting by spammers.
  3. The newline code “%0A” works well with MS Outlook Express but there have been mixed results with other email clients. (Thanks to Willians for info on this.)
  4. BCC will not always work, it’s a bit ‘buggy’
  5. These were tested in MS Outlook, MS Outlook Express, Lotus Notes and Mozilla Thunderbird and in general performed correctly (note point 3 & 4 above).