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Re: Is there a way to force "via groups.io"? #issue


 

Pete,

Not true. While -some- email servers use the envelope-From in SPF validation, -all- Exchange servers (most enterprise and business servers including Office 365) use the actual from address as well since this is a common form of spoofing.

Perhaps read "-some-" email servers as every email service other than those powered by Microsoft Exchange.

I guess that explains our disparate perceptions: I'd have to guess that the vast majority of the members of groups I've moderated (and the groups those members have moderated) have been consumer users, with mailboxes provided by Google, Yahoo Mail, AOL, and others not based on Exchange. For these services I've only seen aligning the header-From with the envelope-From in conjunction with DMARC.

So I had been unaware that there was an ongoing deliverability problem with Exchange-powered mailbox providers, if Mark mentioned that earlier I must have missed it. But that's where my perception that you were talking about a fringe case came from.

I realize you don't like or have experience with Microsoft Exchange or its common deployment (it also does not directly implement DMARC), but it is the most used enterprise and business mail server.

You are correct that I don't have much experience with Exchange. I don't really have a like or dislike opinion of it, the one Exchange-based email address I have is a PITA to use, but I believe that's mostly a matter of security choices made by my client. Example: no IMAP/SMTP access, I have to use their webmail interface.

Oh, and I'm not subscribed to any email lists via that address - so I've had no exposure to whatever issues that might entail.
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BTW, Yahoo has always supported having groups show the From as being the group, not the user so it would pass server tests that the from is not improperly originating from a non-domain-owned mail server.

Unless you mean the option to hide one's email and IP addresses, I've never heard of such a thing. Before that 2014 Yahoo Groups blog post I cited, all header-from addresses passed through Yahoo Groups unaltered -- as stated in the blog post. I have ten years of examples (2003 to 2013) from various Yahoo Groups consistent with that behavior.
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I guess I need to open this over on the beta group.? Thank you for letting me know where to go with this issue.

You're welcome. All-in-all I'm sorry I didn't get back to you sooner when you said "crickets".

Shal


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