ecs-isp@2rosenthals.com ?????????????? ????? #1172

???:	"Dan Napier" <ecs-isp@2rosenthals.com>	?? ???? ?????????
??:	RE: [eCS-ISP] Trouble getting mail delivered to Office365 (outlook.com), ProofPoint, and Barracuda protected domains
??:	Tue, 22 Apr 2025 14:12:16 -0700
??:	"'eCS ISP Mailing List'" <ecs-isp@2rosenthals.com>

Lewis, Yes I am seeing weird messages from user screens saying dan@cihcsp.com is not a valid email! I am using barracuda as a mail scanner. Both the cloud and a hardware device in my own server room. I am baffled because I do not see any blacklisting or other information. I am using DNS running the latest bind from our friend from down under a arcanoae the mail server in question is running on linux. YOS Dan Napier -----Original Message----- From: eCS ISP Mailing List [mailto:ecs-isp@2rosenthals.com] Sent: Tuesday, April 22, 2025 1:50 PM To: eCS ISP Mailing List <ecs-isp@2rosenthals.com> Subject: [eCS-ISP] Trouble getting mail delivered to Office365 (outlook.com), ProofPoint, and Barracuda protected domains Hi, all... For the past few days, I've been dealing with an issue of mail from 2rosenthals.com apparenly getting blackholed by certain providers. We do not receive any kind of DSN. From all accounts, the email is going out for delivery and that's that. However, on the other end, recipients aren't seeing the messages, nor are they getting any kind of spam notification or other warning that a message could not be delivered. Affected domains seem to be hosted with a handful of providers, Office365 among them, which uses outlook.com. Naturally, I've checked both the outlook.com and live.com internal lists, and both show that neither of our IPs is listed. Other MXs which seem to be behaving similarly are: gpphosted.com (ProofPoint) barracudanetworks.com Multiple multiple-RBL checks come up clean for both IPs and our domain. SPF, DKIM, and DMARC configurations all look fine (read: pass specific checks by various third parties, including mxtoolbox.com). Mail flows without incident to gmail.com and yahoo.com. Is anyone else seeing anything like this? TIA -- Lewis ------------------------------------------------------------- Lewis G Rosenthal, CNA, CLP, CLE, CWTS, EA Rosenthal & Rosenthal, LLC www.2rosenthals.com visit my IT blog www.2rosenthals.net/wordpress ------------------------------------------------------------- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= This message is sent to you because you are subscribed to the mailing list <ecs-isp@2rosenthals.com>. To unsubscribe, E-mail to: <ecs-isp-off@2rosenthals.com> To switch to the DIGEST mode, E-mail to <ecs-isp-digest@2rosenthals.com> To switch to the INDEX mode, E-mail to <ecs-isp-index@2rosenthals.com> Send administrative queries to <ecs-isp-request@2rosenthals.com> To subscribe (new addresses), E-mail to: <ecs-isp-on@2rosenthals.com> and reply to the confirmation email. Web archives are publicly available at: http://lists.2rosenthals.com This list is hosted by Rosenthal & Rosenthal, LLC P.O. Box 281, Deer Park, NY 11729-0281. Non- electronic communications related to content contained in these messages should be directed to the above address. (CAN-SPAM Act of 2003) =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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