Hi, I have two questions regarding using SPF when I am using Postfix with virtual domain hosting.
I currently have an SPF record in my DNS: example.com TXT “v=spf1 ip4:1.2.3.4/32 ip6:1:2:3::4/128 ?all” I virtually host a domain (in this example case, example.com), that is set to forward mail to recipients on Gmail. As an example case, if I send an e-mail from a Hotmail account to an address on my server it then forwards that mail to the user’s GMail e-mail address. Path: u...@hotmail.com — > example.com (virtual domain) — > u...@gmail.com When examining the e-mail details on GMail, I receive a “SOFTFAIL” for either the IPv4 or IPv6 of my server. Farther down in the mail I see: (google.com: domain of transitioning u...@hotmail.com does not designate 1:2:3::4 as permitted sender) Testing mail that actually originates from the server (not forwarded through virtual hosting), with the “mail” program shows a PASS of SPF on GMail. My questions are: 1. When using Postfix and virtual domain hosting in this fashion, is there any way to pass SPF when mail from a sending account is forwarded to another host (ie: Gmail) ? 2. Do I need to be concerned with a SPF SOFTFAIL from GMail when the same message generates a pass for DKIM (I have OpenDKIM configured and running correctly), and DMARC ? In this case, does a SPF SOFTAIL but a DKIM and DMARC pass mean that SPF is always discounted and the mail won’t be quarantined ? Thanks for your help, - J
