When clicking on hyperlinks that are set to open a compose email message on OSX the Mail.app application will launch. Since it is likely that your preferred email application is something other than Mail.app such as Mozilla Thunderbird, Opera, Microsoft Outlook for Mac, Postbox, Sparrow, or something else then you will want to change the default email client to your preferred email application. In my case I use MS Outlook for the Mac so I needed to set the default email client to Outlook. Use the directions below to modify the default application that opens to compose email messages.
After switching your ISP(Internet Service Provider) your email accounts seem to no longer be functioning. Typically this is caused by the outgoing (SMTP) mail server not being accepted from the new Internet providers network. This is normal and one of the main tools that ISP’s use to fight Spam e-mails. They do not allow people not on their network to send email using there email servers. Follow the steps below to change your outbound mail server to your new provider so you can still use the email account from your old Internet provider.
One bit of information you will need before you begin is the SMTP server of your new provider. You can either look this up on the Internet or you can call your new providers technical support and they should be able to provide it to you.