[mailop] Anyone tried and couldn't use SPF macros due to interoperability issues?

Has anyone recently encountered any “modern” mail system that can’t handle SPF macros? The RFC is about a decade old at this point. I don’t care if Exchange 2003 can’t handle them, but does anyone know any reasonably modern system that doesn’t? I know all our systems like them just fine, and I’

Re: [mailop] WPEngine, Mail Channels, 365, MX Toolbox, Mail Genius

On Wed, Sep 6, 2023 at 8:20 AM Charles Meigh via mailop wrote: > I think you are seeing MS composite (or implicit) authentication at work. > You mention that you see Junk placement on O365, and if that is if, and > only if you send to O365-hosted mailboxes than I think that is the root > cause. (

Re: [mailop] Debian lists contact?

> You'll find list maintainer contact information in the "list > maintenance" section of: Thank you for pointing this out. I am somewhat embarrassed to have overlooked that. Ken ___ mailop mailing list mailo

Re: [mailop] WPEngine, Mail Channels, 365, MX Toolbox, Mail Genius

I think you are seeing MS composite (or implicit) authentication at work. You mention that you see Junk placement on O365, and if that is if, and only if you send to O365-hosted mailboxes than I think that is the root cause. (https://learn.microsoft.com/en-us/microsoft-365/security/office-365-se

Re: [mailop] WPEngine, Mail Channels, 365, MX Toolbox, Mail Genius

Your SPF record is not causing your mail to hit your junk folder. Also, the link from MXtoolbox shows there is a SPF record there. It’s red because the domain doesn’t align with your 5322.from address, but you aren’t going to be able to fix that. That’s a valid SPF record and the IP address the