my login has changed (new company) but ssh still has old email as label

[Mike Murnane]

New login email address and new profile reflects this but adding my ssh public key (that I had previously but have revoked its use) and now added under my new identity (new email) still has old email as 'label'. I am unable to authenticate to Git through Sourcetree

[jredmond]

The label in an SSH public key has no effect on the key function. It's only there for humans to tell keys apart.

[jredmond]

The label in an SSH public key doesn't affect the key's function - it's only there so humans can tell keys apart, and it's safe to remove if you want.

[Mike Murnane]

OK - the situation happens for ssh authentication because a change of email addresses makes accessing the old key impossible. You need to make a new key with the new email address. Removing the old key and then trying to apply it as the user with a new email simply reestablishes the old emails key.