Re: [mailop] SPF fragility vs. utility

On 21.10.2024 at 11:32 Gellner, Oliver via mailop wrote > On 17.10.2024 at 19:43 L. Mark Stone via mailop wrote: >> Back in May at the InboxExpo conference in Atlanta, I was told by a >> consultant to very large senders that they advise customers to set their >> DMARC to "p=quarantine" because

Re: [mailop] SPF fragility vs. utility

They are definitely working on it, if not very fast, we have been working with their engineering team on this for some time, and they know they have a problem but the problem is not in the hands of their exchange team, the problem is on the side of the DNS servers software stack so I suspect p

[mailop] Problems forwarding email to Yahoo

Hello, A number of our forwarding systems are having an increasing problem forwarding client email to yahoo mailservers, from each system the errors are for the most part the same, only varying IPs. postfix/smtp[3088571]: 1E118AE6D0: to=, orig_to=redacted>, relay=mx-biz.mail.am0.yahoodns.net[

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Has SpamCop been integrated into the Talos Intelligence handling flow yet? Talos has historically been one of those "we label everything as bad with a quarter of a braincell so we can tell clients we've blocked a million billionty attacks for them and they should pay us more" operations, I imagi

[mailop] SURBL contact?

Does anyone on the list know anyone at SURBL, or is anyone at SURBL on this list? A customer of ours at MXroute has his domain blacklisted on there. They don't give a reason, won't remove it, and I can't open a ticket with them because one was already opened. I've never run into issues with SUR

Re: [mailop] SPF fragility vs. utility

+1 - I've also heard second-hand that allegedly improvements are in the works Microsoft has made through the month of October on this, and a tentative fix is slated for Nov. 18. I don't have any reason to not believe this source - but like most others here, I'll believe it when I see it reflect

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Not really. Smaller providers manage their reputation a lot more carefully.  Scott On Monday, 11/11/2024 at 03:24 Suresh Ramasubramanian via mailop wrote: Not an unusual state of affairs with a spam trap fed blocklist and overall high levels of outbound spam from any given platform.  -

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Suresh said: > Not an unusual state of affairs with a spam trap fed blocklist and overall > high levels of outbound spam from any given platform. And then Scott said: > > Not really. Smaller providers manage their reputation a lot more carefully. Which is essentially the exact same thing. For

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Interesting; is there a straightforward way to drop that traffic entirely? I think the HRDP IPs and hostnames are probably indistinguishable for folks outside of the Microsoft ecosystem, and "OutboundIpPoolName=HighRiskOutboundPool" is some tenant-viewable internal marker that's not actually

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

SFV:SPM is what you want to filter on, in headers https://learn.microsoft.com/en-us/defender-office-365/message-headers-eop-mdo As for their high risk delivery pool I see this list but not on a Microsoft resource so please take that under advisement and do your due diligence https://sourceforge

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

On 11.11.2024 at 08:58 Jörg Backschues via mailop wrote: > just for your information: > Microsoft Exchange Online has been blacklisted by Cisco's SpamCop: > To add on that: Cisco Talos / Senderbase also repeatedly blacklisted "live

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

But it's not really the same. Not all providers offer free accounts which clearly attracts abusers a lot more than paid accounts. Furthermore, not all providers do this: "Segregation of outbound email traffic: Every outbound message that's sent through the service is scanned for spam. If the messa

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

It's possible that the system that marks the e-mail with the X-Forefront-Antispam-Report: ...;SFV:SPM;... also sends it to the less-reputable-ip-address pool to be sent out, so one would think that basing a filter off of X-Forefront-Antispam-Report *should* be enough. https://www.mail-archive.

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Oh thank you. I am so glad you explained this to me. —srs From: mailop on behalf of Scott Q. via mailop Sent: Monday, November 11, 2024 5:45:50 PM To: Graeme Fowler ; Mailop Subject: Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024 But it's not

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Fair enough. And personally and speaking only for myself, I know and like the spam cop folks since the late 90s but as things stand I wouldn’t use them as a BL to filter my personal mail. —srs From: Scott Q. Sent: Monday, November 11, 2024 7:01:52 PM To: Suresh

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Hi Suresh, I didn't mean to explain it to you, I know you know how things work very well. I was just explaining to the list, because some folks may not and it's important to not lump together big providers that don't care that much for their reputation ( because they are too big to block basically

[mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Hello MailOps, just for your information: Microsoft Exchange Online has been blacklisted by Cisco's SpamCop: -- Regards Jörg Backschues ___ mailop mailing list mailop@mailop.org https

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

Not an unusual state of affairs with a spam trap fed blocklist and overall high levels of outbound spam from any given platform. --srs From: mailop on behalf of Jörg Backschues via mailop Sent: Monday, November 11, 2024 1:27:59 PM To: MailOp Mailing List Subje

Re: [mailop] Blacklisting of Microsoft Exchange Online Nov. 2024

> Microsoft Exchange Online has been blacklisted by Cisco's SpamCop: > > One of the very many IPs they use. I'm sure you could find a few more if you looked. As a data point, during November 2024 so far, our spamtraps have receive

[mailop] Crown Castle Fiber?

Is there anyone here who knows anyone at Crown Castle Fiber? They have an unrepentant spammer spamming impunity from their IP space, and apparently abuse@ goes to /dev/null, based on the complete lack of response. :~( Thanks for any assistance. Anne -- Anne P. Mitchell, Esq. Email Law & Polic

Re: [mailop] SURBL contact?

Hello Jarland, If we don’t want to remove it likely your client is not cooperative. You can reach out to me with the ticket number or domain and I can have a look. But I rather have the client resolve this. We are very easy on delistings. With kind regards, Raymond Dijkxhoorn > Op 12 nov 20