phishing or not, it's frankly a bit annoying getting these on every mail and reply.
would be very nice to have the person who's made that to maybe make it so at least it doesnt auto reply fido mails.
I doubt it is a phishing attempt tho.
1) it says SIGN UP with password, aka register a new account.
2) the mail claims to be from jira, which is a support software by atlassian
3) the 9g... domain points to an IP address that is owned by atlassian themselves so likely an atlassian-hosted instance of jira.
4) they got your email by nature of sending an email "to" them via the mailing list, in fact I can see your mail addresses too, and then adding the mail address as part of the link in the autoreply.
so TLDR this seems like just a support system saying they got your mail and offering you to make an account to track your ticket.