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Setting Up Email: Thunderbird for Mac OS X

Thunderbird was created by Mozilla in 2004. It is a free, open-source email client that can be downloaded at Thunderbird.net.

If you need help finding your username and other configuration settings, see our article, Setting Up an Email Reader.

Setting up your Email for Thunderbird on OSX

Thunderbird Version 60.7.0 +

  1. Go to Applications in Finder and open the Thunderbird applicationthunderbird application image
  2. In the left sidebar, click Local Folders
  3. Under the Accounts section, click Emailemail image
  4. A pop-up will appear. On this pop-up, enter the following information:

    Your Name The name that will display on the email address
    Email Address The email address you want to add to the email client
    Password The password for the email address. Note that this is not the password for your hosting account.

    information image

  5. Select IMAP or POP. For more information about the difference between IMAP or POP, see our IMAP vs POP article.imap vs pop image
  6. Click Manual configmanual config image
  7. Under the Server hostname, enter the incoming and outgoing servers. For more information about how to find your mail servers, see our article: How to Find Your Email’s Incoming and Outgoing Serversusername image
  8. Under SSL, select SSL/TLSssl tls image
  9. In the text field next to Username Incoming and Outgoing, enter your ACC usernameusername image
  10. Click Done

If all the information is correct, your email address will be added to the Thunderbird email client.

Thunderbird Version 52.7.0 - 52.9.1

For Thunderbird releases 52.7.0 - 52.9.1

  1. Go to Applications in Finder and open the Thunderbird applicationthunderbird application image
  2. In the left sidebar, click Local Folderslocal folders image
  3. Under the Accounts section, click Emailemail image
  4. Click Skip this and use my existing emailskip and use existing button image
  5. On the next page, enter your display name, email address, and email address password, then click Continuestep 1
  6. Choose between IMAP or POP. For more information see our IMAP or POP: Which One Should You Use? articleimap or pop image
  7. Click Manual Configmanual config image
  8. Replace the Incoming and Outgoing Server hostnames with your mail server. For help finding your mail servers, see our How to Find Your Email's Incoming and Outgoing Servers articleservers image
  9. Replace the Username with your account usernameusername image
  10. Under SSL, select SSL/TLS  for both incoming and outgoingssl tls image
  11. Click Done to finish

    If the Done button is grayed out, click the Re-test button first. If your information is entered correctly, the Done button will become clickable.

Thunderbird Version 52.3.0 - 52.6.0

For Thunderbird releases 52.3.0 - 52.8.0

  1.  Go to Applications in Finder, and open up the Thunderbird applicationthunderbird-osx-img1
  2. Under Create a new account: click Emailemail image
  3. Click Skip this and use my existing email
  4. Add your name, email address, and password and click Continuethunderbird-osx-img3
  5. Choose between IMAP or POP. For more information see our IMAP or POP: Which One Should You Use? article
  6. The application will automatically scan for incoming and outgoing email servers and display them and your username below. If these details are correct, skip to Step 11.thunderbird-osx-img4
  7.  If these details are incorrect, click Manual Config, then click Advanced Config to change them
  8. Next to Server Name, input the email's server name
  9. Next to User Name, input your username followed by its full domain name
    • Example: username@domain.com
  10. Under Outgoing Server (SMTP) choose your email from the list and click Edit
  11. In the User Name field, type your username followed by its full domain name
    • Example: username@domain.com

      Note: Make sure the Server Name matches the server name you entered earlier

  12. Click OK to finish

Using SSL to Secure Your Email

Pair Networks provides support for SSL/TLS and STARTTLS encryption for all IMAP, POP, and authenticated SMTP connections. Using encryption is an important way to prevent your password from being stolen.

POPS/IMAPS only secures the connection between your email reader and the mail server. Once it reaches the mail server, it will be in plain text. For additional security, you would need to encrypt the email message itself. The port for POPS is 995, the port for the IMAPS is 993, and the ports for encrypted authenticated SMTPAUTH are 465 and 587. These are the standard ports for these services, and you should not need to manually set them.

Please note that we replaced the secure certificate used to provide POPS, IMAPS, and SMTPS email services (sending and receiving email over SSL). Our SSL certificate vendor has changed to a new "root" certificate, which is recognized by most, but not all, email programs. If your email program begins returning errors and indicates that the server certificate is not recognized, please download the root certificate below and install it in your email program. The specifics of how to install a certificate will vary from program to program -- please consult the help files of your program for details.

USERTrust RSA CA Root.crt

Please also note that our mail servers use an SSL certificate. If you use this SSL option in conjunction with a domain name, your email reader may warn you that the domain names do not match. Some email readers will allow you to ignore this warning. In these cases, your incoming email will remain secure.

However, some email readers will not let you proceed if the security certificates do not match. If this occurs, please verify your incoming server settings as follows:

For accounts created prior to June 1, 2011:

(where X is your server number)

For accounts created on or after June 1, 2011:

(where "username" is your main account username)

Updated on May 19, 2020

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