Re: [mailop] Cannot send messages to Google Mail users

Hi, Marco Moock via mailop wrote on 24.04.24 at 10:41: That is fine, the host has 2 addresses attached. Both have a PTR. I don't see a DNS issue. I just had a look at one of my friend's MX and can confirm that the PTR was correct there as well - but disabling IPv6 interestingly helped to

Re: [mailop] Cannot send messages to Google Mail users

Hello, Simon Branch via mailop wrote on 24.04.24 at 09:28: /550 5.7.350 Remote server returned message detected as spam -> 550 5.7.1 [2a01:111:f403:261b::700 19] Gmail has detected that this message;is likely suspicious due to the very low reputation of the sending;domain. / /To best

Re: [mailop] Microsoft heads-up - Outlook Deliverability Support not working

Hello, Allen Kevorkov via mailop wrote on 12.03.24 at 16:41: I don't know if it's just us, but I've been getting "we're experiencing technical difficulties" response for a number of tickets submitted to Outlook.com deliverability support. We're unable to get any issues resolved. If someone

Re: [mailop] Microsoft/Lindo - junked,not blocked

Hello, Raman Gupta via mailop wrote on 07.12.22 at 15:40: Closest I've found is https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75 but I'm pretty sure I've

Re: [mailop] Microsoft/Lindo - junked,not blocked

Hi, Raman Gupta via mailop wrote on 07.12.22 at 14:45: SNDS reports exactly the same for my mail server's outbound IP address 74.207.245.70/32 , however weirdly every test I've done to actual Office365 addresses works fine. It bothers me that SNDS still reports this

Re: [mailop] [Marketing Email] t-online.de

Hi, John Devine via mailop wrote on 27.11.22 at 12:27: Well….they whitelisted me this morning with no website imprint etc, just an explanation from me as to how long I had run an MTA etc……. thanks for sharing - so seems they do some "sanity checks", probably also depending on the IP range,

Re: [mailop] t-online.de

Hello, seems I forgot to reply to the list, so let me re-send my answer here. :) I was just this week able to unblock two IPs. Requirement was the same as before, a website with an imprint. No proof of commercial use required. Florian ___ mailop

Re: [mailop] T-Online is now really blocking messages from non-commercial and simliar senders

Hi, Kai 'wusel' Siering via mailop wrote on 21.10.22 at 18:28: To stay ontopic here, the question is: _why_ were you getting "blocks left and right"? And what were they? Was it a "fresh & clean" IPv4 address or one that had been abused in the past? What did the RBL checking tools tell you

Re: [mailop] Update: it's not. Re: T-Online is now really blocking messages from non-commercial and simliar senders

Hello, Bernardo Reino via mailop wrote on 21.10.22 at 16:32: Well Germans are not what they used to be , so maybe that one considered your insistence enough to whitelist you.. or perhaps the decision of when a server is commercial or not is not /that/ well-defined for them. maybe the term

Re: [mailop] T-Online is now really blocking messages from non-commercial and simliar senders

Hi, Grant Taylor via mailop wrote on 21.10.22 at 07:09: I believe there have been multiple others beside myself that think that T-Online should NOT be shunned in MTA /default/ configurations. I am neither a package maintainer nor a mail server developer, so my voice likely is just a very

Re: [mailop] T-Online is now really blocking messages from non-commercial and simliar senders

Hello, Grant Taylor via mailop wrote on 20.10.22 at 16:06: Please forgive ~> humor my ignorance, but what does the imprint / impressum (?) /need/ to have in it? not sure what Telekom actually asks for - but (as you can imagine, it's Germany :) things are quite regulated in the law. Depending

Re: [mailop] T-Online is now really blocking messages from non-commercial and simliar senders

Hello, Kai 'wusel' Siering via mailop wrote on 20.10.22 at 15:51: As a German, you have to have an imprint on anything that is considered a "service", yes, even on your personal, non-monetized blog. It the law ;) And also off-topic here. I agree, this part of the discussion will likely

Re: [mailop] T-Online is now really blocking messages from non-commercial and simliar senders

Hello, Bernardo Reino via mailop wrote on 20.10.22 at 09:01: I wasn't aware of the timing aspect, so thank you for this! that's at least what I understood back in the days. :-) Whether there's a more fine-grained approach, differentiation by ISP reputation and other factors, I don't know.

Re: [mailop] T-Online is now really blocking messages from non-commercial and simliar senders

Hello, I actually ran into a similar problem last year after a mail server migration. Here's what I documented back then in my blog: "Deutsche Telekom, respectively T-Online, by default blocks IP addresses that haven’t been used for sending e-mails to their servers for a certain amount of

Re: [mailop] Moving email server to new IP

Hi, Nate Burke via mailop wrote on 07.07.22 at 19:41: I've had a small multi-domain business mail server running on the same IP for the last 20 years, I need to change the IP from an address in a reassigned IP block, to my own ARIN block.  Is IP reputation still a big deal, or are anti-spam

Re: [mailop] Microsoft banned sender (Linode hosted IPs)

Hello, Andy Smith via mailop wrote on 01.03.22 at 21:12: So again, if anyone is able to push that along I'd be most grateful. Also if it's totally pointless for the intended recipient to do anything I'd appreciate knowing so I can stop pushing them about it. I made indeed good experiences

Re: [mailop] Manitu blocking Microsoft relay servers

Hi, Raymond Dijkxhoorn wrote on 26.11.21 at 10:57: I saw that. I resolved it locally and posted just here to give both Microsoft and Manitu/NixSpam a heads up. The list might not be used insain widely, i dont know, but decided to post so they can resolve it. I am not going to request

Re: [mailop] Manitu blocking Microsoft relay servers

Hello, Raymond Dijkxhoorn via mailop wrote on 26.11.21 at 09:53: (Also sended to them directly but hopeing someone can ping them) rejected because 40.107.8.138 is listed at ix.dnsbl.manitu.net never tried myself, but on https://www.nixspam.net there's a form to ask for unblocking. Not sure

Re: [mailop] Low Volume Senders

Hi, Brielle via mailop wrote on 20.09.21 at 16:33: You could increase that volume by sending DMARC aggregate reports. Is there any (preferably free / open source) tools to make generating these aggregate reports easy enough? seems rspamd supports this:

Re: [mailop] Cyren status regularly flapping back to Suspicious

Hello, Alessandro Vesely via mailop wrote on 07.07.21 at 13:27: So it's IPv4.  Talos[*] reports low email activity on it.  Do you send out DMARC reports and similar stuff?  I found that doing so increases my footprint and hence stabilizes reputation, albeit some point out that reports can be

Re: [mailop] Cyren status regularly flapping back to Suspicious

Hello, thanks for the replies! John Levine via mailop wrote on 05.07.21 at 18:59: I believe the recipient's mail system is misconfigured. If Cyren tags an IP as yellow, they should soft fail with 450 so it can retry later. That could be indeed helpful. I was reaching out to their

[mailop] Cyren status regularly flapping back to Suspicious

Hello, I have some issues with the Cyren blocklist - one recipient's server is bouncing mails back with 550-5.7.1 This email was rejected because it violates our security policy 550 5.7.1 CYREN IP reputation determined a medium risk associated with the sender address X.X.X.X. (in reply to

Re: [mailop] Gmail's MTA is broken

Hello, Thomas Walter via mailop wrote on 07.06.21 at 21:08: And there's also systems that send a 5xx and immediately disconnect without waiting for the "quit" from the initiating party to properly terminate the SMTP session. In those cases MTAs following the RFCs see this as a failed

Re: [mailop] [EXTERNAL] Re: protection.outlook.com refusing to accept mail with misleading temp error message

Hi, Jay Hennigan via mailop wrote on 02.06.21 at 23:39: Allowing such queries would be giving quite a bit of information to potential bad guys. honestly don't know what is better. The majority of DNBLs can be queried publicly, and I could imagine for those who really aim hard, simply

Re: [mailop] [EXTERNAL] Re: protection.outlook.com refusing to accept mail with misleading temp error message

Hi Michael, Am 2021-06-02 21:09, schrieb Michael Wise via mailop: Sending from that IP is ... how one usually tests that it's working. what IMHO would be much better to check newly assigned IPs is, if there's a way to query via DNS, or a web form. That way the issue can be solved and

Re: [mailop] protection.outlook.com refusing to accept mail with misleading temp error message

Hello, I'm rather new to this list, so I hope it's okay to jump in directly in this discussion and share some thoughts. :-) I just recently faced a very similar problem with one of the new IPs I got assigned. Likely, the IP was in use by someone else previously or there are spammy