Question about email domain fill list

Hi,

when entering an email address with Swiftkey, there's the key with the @-sign to the right of the space bar. When doing a long press, it offers a list of domain names (for me "@yahoo.com", "@hotmail.com" and "@gmail.com") for quick fill. Is there any way to edit this list? I would love to add a few entries to this list.

Best regards,

Daniel