How can I reliably link to a Gmail conversation given a thread ID if the user is logged into multiple accounts?

Question

If you\'re logged into multiple Gmail accounts, Google changes the URLs to reference which account you\'re currently using. For example:

https://mail.google.co

Answer 1

Looks like you can include a query parameter called authUser that specifies the email account you want to link to:

https://mail.google.com/mail/?authuser=your.email.address@gmail.com#all/138d85da096d2126