I have registered here via github, but previously I tried using an email address of my own. My mail server rejected the account authorisation emails with the following:
NOQUEUE: reject: RCPT from mail.stalw.art[135.181.195.209]: 550 5.7.24 [email protected]: Recipient address rejected: Message rejected due to: SPF Permanent Error: Two or more type TXT spf records found..
I think this is some sort of misconfiguration, but I stand to be corrected.