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Re: [milter-greylist] Weird problem with Microsoft domains

2018-11-21 by john

Hi Stefan,

I understand now. It seems like you cannot disable DKIM easily.

Based on the link below, I assume something like
dacl greylist dkim none
Followed by similar for each other status
would disable DKIM.
https://milter-greylist.yahoogroups.narkive.com/WW7OvXTc/dkim-support-in-milter-greylist

Best
John



Stavefejl og lignende krediteres min Samsung Galaxy 8.

-------- Oprindelig besked --------
Fra: "Stefan Suurmeijer stefan@raptorweb.nl [milter-greylist]" <milter-greylist@yahoogroups.com>
Dato: 21/11/2018 19.06 (GMT+08:00)
Til: milter-greylist@yahoogroups.com
Emne: Re: [milter-greylist] Weird problem with Microsoft domains

Hi John,

No, not yet! I was looking for a configuration option to disable DKIM. I found this

dkim DKIM status (if build with DKIM support). Possible values are pass, fail, unknown, error, and none

in the man file. But that seemed more like an evaluation than an option (status?)? How would configuring it work?

Something like

dacl greylist dkim outlook.com none
or
racl greylist dkim outlook.com none
??

Completely disabling DKIM evaluation for all domains is acceptable too, don't need milter-greylist to check it for me.

Thanks
Stefan




On 11/21/18 11:38 AM, john john@hovedpuden.dk [milter-greylist] wrote:
Hi Stefan

Have you tried to set dkim to none in the configuration file?

Best
John


Stavefejl og lignende krediteres min Samsung Galaxy 8.

-------- Oprindelig besked --------
Fra: "Stefan Suurmeijer stefan@raptorweb.nl [milter-greylist]" <milter-greylist@yahoogroups.com>
Dato: 21/11/2018 17.36 (GMT+08:00)
Emne: Re: [milter-greylist] Weird problem with Microsoft domains

Hi Atilla,

DNS isn't the issue. Apparently nslookup (or my command) was the issue there, since:

root@myhost:~# dig +short txt selector1._domainkey.outbound.protection.outlook.com.
"v=DKIM1;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvWyktrIL8DO/+UGvMbv7cPd/Xogpbs7pgVw8y9ldO6AAMmg8+ijENl/c7Fb1MfKM7uG3LMwAr0dVVKyM+mbkoX2k5L7lsROQr0Z9gGSpu7xrnZOa58+/pIhd2Xk/DFPpa5+TKbWodbsSZPRN8z0RY5x59jdzSclXlEyN9mEZdmOiKTsOP6A7vQxfSya9jg5" "N81dfNNvP7HnWejMMsKyIMrXptxOhIBuEYH67JDe98QgX14oHvGM2Uz53if/SW8MF09rYh9sp4ZsaWLIg6T343JzlbtrsGRGCDJ9JPpxRWZimtz+Up/BlKzT6sCCrBihb/Bi3pZiEBB4Ui/vruL5RCQIDAQAB;n=2048,1452627113,1468351913"

So with dig I do get the DKIM key. And my SPAMD milter also checks DKIM and says "DKIM valid". The strange part is that with the same nslookup sequence on for example gmail I don't get the same issue, but anyway, apparently it isn't the reason for milter-greylist to complain. Which means I still have no idea. Every other domain is working fine, but all Microsoft domains get a "retry later" every single time they connect.

I'm running Ubuntu 18.04, sendmail, milter-greylist, clamav-milter and spamasassin-milter.

Anyone have any ideas?

KR
Stefan



On 11/21/18 9:02 AM, 'Bruncsak, Attila' attila.bruncsak@itu.int [milter-greylist] wrote:

> > selector1._domainkey.outbound.protection.outlook.com
> ;; Truncated, retrying in TCP mode.
> Server: 127.0.0.53
> Address: 127.0.0.53#53
>
> Non-authoritative answer:
> *** Can't find selector1._domainkey.outbound.protection.outlook.com: No answer

You must have an issue with the domain name resolution. Try to fix it. For me it just works:

$ dig +short txt selector1._domainkey.outbound.protection.outlook.com.
;; Truncated, retrying in TCP mode.
"v=DKIM1\;k=rsa\;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvWyktrIL8DO/+UGvMbv7cPd/Xogpbs7pgVw8y9ldO6AAMmg8+ijENl/c7Fb1MfKM7uG3LMwAr0dVVKyM+mbkoX2k5L7lsROQr0Z9gGSpu7xrnZOa58+/pIhd2Xk/DFPpa5+TKbWodbsSZPRN8z0RY5x59jdzSclXlEyN9mEZdmOiKTsOP6A7vQxfSya9jg5" "N81dfNNvP7HnWejMMsKyIMrXptxOhIBuEYH67JDe98QgX14oHvGM2Uz53if/SW8MF09rYh9sp4ZsaWLIg6T343JzlbtrsGRGCDJ9JPpxRWZimtz+Up/BlKzT6sCCrBihb/Bi3pZiEBB4Ui/vruL5RCQIDAQAB\;n=2048,1452627113,1468351913"
$


-- 
================================================================
Stefan Suurmeijer
Raptor Network & Web solutions
Woldweg 161a
NL-9606 PD Kropswolde, The Netherlands
tel: (+31) 50 363 9215 / (+31) 6 52 067 168 (cell)
E-mail: stefan@raptorweb.nl
================================================================

PGP fingerprint: 2CC6 5313 2F58 862F 1542 AECF 2385 6F8A BC45 9F86

Always acknowledge a fault. This will throw those in authority off their guard and give you an opportunity to commit more - Mark Twain

-- 
================================================================
Stefan Suurmeijer
Raptor Network & Web solutions
Woldweg 161a
NL-9606 PD Kropswolde, The Netherlands
tel: (+31) 50 363 9215 / (+31) 6 52 067 168 (cell)
E-mail: stefan@raptorweb.nl
================================================================

PGP fingerprint: 2CC6 5313 2F58 862F 1542 AECF 2385 6F8A BC45 9F86

Always acknowledge a fault. This will throw those in authority off their guard and give you an opportunity to commit more - Mark Twain

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