Notifications from forum are going to SPAM folder

Just noticed a bunch of emails from the forum went straight into SPAM, because there is no SPF/DKIM used for emails.

Quote:Received-SPF: neutral (google.com: 2a03:f80:ed15:149:154:152:149:1 is neither permitted nor denied by best guess record for domain of www-data@hashcat.net) client-ip=2a03:f80:ed15:149:154:152:149:1;
Authentication-Results: mx.google.com;
      spf=neutral (google.com: 2a03:f80:ed15:149:154:152:149:1 is neither permitted nor denied by best guess record for domain of www-data@hashcat.net) smtp.mailfrom=www-data@hashcat.net

Would be nice if you could set up SPF and DKIM for emails.

Thanks!