[zephharben]

mxtoolbox indicates that SPF for telus.com redirects to "_spf_telus_com.nssi.telus.com", which designates "_spf.google.com" as an authorized sender.

That's why the SPF check doesn't fail.

However, in the year 2018 I'm shocked that Gmail would put messages that fail dmarc into users' inboxes.

[ryan-c]

It's not being sent from any of the IPs listed under _spf.google.com, though.