Mailing List ecs-isp@2rosenthals.com Archived Message #1175

From:	"Lewis G Rosenthal" <ecs-isp@2rosenthals.com>	Full Headers Undecoded message
Subject:	Re: [eCS-ISP] Trouble getting mail delivered to Office365 (outlook.com), ProofPoint, and Barracuda protected domains
Date:	Wed, 23 Apr 2025 13:19:52 -0400
To:	eCS ISP Mailing List <ecs-isp@2rosenthals.com>

Hi, Dan... On 04/22/25 06:36 pm, Dan Napier wrote: Lewis, I am not aware that anything is going south. People sometimes tell me that they get a bounce, most of the time I get an angry call that I did not respond to their email!!! I ain't getting stuff. The Logs on the Barracuda do not show that they had anything to do with the missing mail. Users from gmail are the usual suspects. It seem google is not sending the mail. Perhaps they are learning from the USPS. Indeed. If that paradigm holds, perhaps our emails will start showing up in a few months. <snip> On a lark, I tightened the DKIM policy from none to reject, and added a 50% limiter (pct=50). To avoid duplicating the DKIM header, I have turned off the smarthost configuration, and am only sending through the firewall local to the mail server. Finally, just in case, I restarted the firewall and the mail server. (When everything else doesn't seem to help, do something - anything - different.) All checks against SPF, DKIM, and DMARC continue to pass. It will take some time for the DNS changes to propagate, of course, as these TXT records were set for a 12h TTL. Testing against my own outlook.com account proved to be a waste of time, as apparently, that isn't able to receive email from anywhere ("mailbox unavailable" finally came back from a test from arcanoae.com; no DSN was sent to my gmail.com or yahoo.com addresses, just no mail received). I have a ticket open with Microsoft, but who knows when or if I will get any response. -- Lewis ------------------------------------------------------------- Lewis G Rosenthal, CNA, CLP, CLE, CWTS, EA Rosenthal & Rosenthal, LLC www.2rosenthals.com visit my IT blog www.2rosenthals.net/wordpress -------------------------------------------------------------

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