Re: [mailop] Strange mail delivery from microsoft

2023-06-18 Thread Hans-Martin Mosner via mailop
Am 19.06.23 um 06:36 schrieb Klaus Ethgen via mailop: I have some update.. Greylisting was not the problem I had/have with microsoft. Your original mail sounded a little different. However, upon re-reading it is possible that you activated greylisting in response to the previous perceived

Re: [mailop] Strange mail delivery from microsoft

2023-06-18 Thread Klaus Ethgen via mailop
I have some update.. Greylisting was not the problem I had/have with microsoft. Due to ongoing attacks (especially also from big clouds like microsoft) I have a limit of 10 connections per IP and hour. That seems not enough for microsoft to deliver 1 or 2 mails per days relyable. What a shity

Re: [mailop] Strange mail delivery from microsoft

2023-06-18 Thread Ángel via mailop
On 2023-06-18 at 17:53 +0100, Klaus Ethgen wrote: > Hi, > > I have tighten my firewall a bit and seen many attacks from Microsoft > (40.92.0.0/16). They contact once from a IP and then never again. If I > greylist them, the will try to deliver from a different address which > gets greylisted

Re: [mailop] DMARC and subdomains

2023-06-18 Thread John Levine via mailop
It appears that Andrew C Aitchison via mailop said: >> FWIW, future development provides for walking down the DNS tree. >> So a DMARC verifier would lookup _domainkey.foo.bar.example.com and >> _domainkey.bar.example.com before reaching _domainkey.example.com. > >Are we talking about

Re: [mailop] Strange mail delivery from microsoft

2023-06-18 Thread Jaroslaw Rafa via mailop
Dnia 18.06.2023 o godz. 19:30:26 Hans-Martin Mosner via mailop pisze: > > Greylisting is something that only makes sense when dealing with > very braindead ratware on hijacked home network connections. That's exactly what greylisting is supposed to do. That "very braindead ratware" once (when

Re: [mailop] Strange mail delivery from microsoft

2023-06-18 Thread Benny Pedersen via mailop
Klaus Ethgen via mailop skrev den 2023-06-18 18:53: I have tighten my firewall a bit and seen many attacks from Microsoft (40.92.0.0/16). They contact once from a IP and then never again. If I greylist them, the will try to deliver from a different address which gets greylisted again and so on.

Re: [mailop] Strange mail delivery from microsoft

2023-06-18 Thread Hans-Martin Mosner via mailop
Am 18.06.23 um 18:53 schrieb Klaus Ethgen via mailop: Hi, I have tighten my firewall a bit and seen many attacks from Microsoft (40.92.0.0/16). Attacks or mail delivery attempts? They contact once from a IP and then never again. If I greylist them, the will try to deliver from a different

[mailop] Strange mail delivery from microsoft

2023-06-18 Thread Klaus Ethgen via mailop
Hi, I have tighten my firewall a bit and seen many attacks from Microsoft (40.92.0.0/16). They contact once from a IP and then never again. If I greylist them, the will try to deliver from a different address which gets greylisted again and so on. Could you please tell me how to handle that

Re: [mailop] DMARC and subdomains

2023-06-18 Thread Andrew C Aitchison via mailop
On Sun, 18 Jun 2023, Alessandro Vesely via mailop wrote: On Fri 16/Jun/2023 22:41:39 +0200 Gellner, Oliver via mailop wrote: On 16.06.2023 at 16:13 Jaroslaw Rafa via mailop wrote: [...] So at least one (and important one, given the size of this mail service) implementation of DMARC does not

Re: [mailop] DMARC and subdomains

2023-06-18 Thread Alessandro Vesely via mailop
On Fri 16/Jun/2023 22:41:39 +0200 Gellner, Oliver via mailop wrote: On 16.06.2023 at 16:13 Jaroslaw Rafa via mailop wrote: [...] So at least one (and important one, given the size of this mail service) implementation of DMARC does not use the PSL. eu.org is located in the private domain