Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-26 Thread Slavko via mailop
Dňa 26. januára 2023 12:11:50 UTC používateľ Florian Vierke via mailop napísal: >If you implement DMARC as a recipient, you must check for DKIM and for SPF, >exactly because one of them is sufficient to pass. If you do only check SPF as >a receiver and the sender is authenticating via DKIM,

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-26 Thread Adam D. Barratt via mailop
On Thu, 2023-01-26 at 12:11 +, Florian Vierke via mailop wrote: > I have understood it that way: > > If you implement DMARC as a recipient, you must check for DKIM and > for SPF, exactly because one of them is sufficient to pass. If you do > only check SPF as a receiver and the sender is

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-26 Thread Christof Meerwald via mailop
On Thu, Jan 26, 2023 at 08:25:20AM +, Gellner, Oliver via mailop wrote: > So to get back to the question of Jason, I wouldn't call it luck. Your > mailing lists work as designed and will continue to work. Other mailing lists > just rewrite the From headers because they like to compose new

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-26 Thread Gellner, Oliver via mailop
On 2023-01-26 00:09, John Levine via mailop wrote: > It appears that jmurray--- via mailop said: >>So what I'm hearing is "luck". Perhaps I should revisit the policy. >>Didn't even realize DMARC with no DKIM was a thing at this point. Thank >>you. > Most of the SPF-only DMARC I see is from

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-25 Thread John Levine via mailop
It appears that jmurray--- via mailop said: >> Do you add subject tags or list footers? If you just pass messages through >> without >> changing them, it's only slightly surprising that DMARC aligns. But most >> lists >> change the messages which make the aligned DKIM signature fail. > >Nope,

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-25 Thread John Levine via mailop
It appears that Slavko via mailop said: >Dňa 25. januára 2023 20:52:39 UTC používateľ John Levine via mailop > napísal: > >>A certain number of domains assert a DMARC policy but only use SPF, no >>DKIM signatures, so you'd expect them to fail alignment. That's the >>slightly surprising part. >

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-25 Thread Slavko via mailop
Dňa 25. januára 2023 20:52:39 UTC používateľ John Levine via mailop napísal: >A certain number of domains assert a DMARC policy but only use SPF, no >DKIM signatures, so you'd expect them to fail alignment. That's the >slightly surprising part. That cannot be named DMARC, as it is SPF **or**

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-25 Thread jmurray--- via mailop
* John Levine via mailop [230125 15:54]: > It appears that Jason Murray via mailop said: > >We process DMARC reports on the daily, and have never had an email from our > >lists fail alignment except in a couple of cases where we had blocked DNS > >queries > >coming from destination domains'

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-25 Thread John Levine via mailop
It appears that Jason Murray via mailop said: >We process DMARC reports on the daily, and have never had an email from our >lists fail alignment except in a couple of cases where we had blocked DNS >queries >coming from destination domains' resolvers (oops). > >Is this just wild luck? Are we an

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-25 Thread Jason Murray via mailop
* Dan Mahoney via mailop [230110 17:18]: > In a world of DKIM/DMarc compliance, especially, where “blow away the > original headers and forward anew” is the best answer, I’m shocked to not > find something like this as well. > The more often I see this stated the more I feel as if I live in

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-12 Thread Ángel via mailop
On 2023-01-10 at 13:59 -0800, Dan Mahoney wrote: > The way postfix handles these aliases, is that it preserves the > original envelope sender and recipient (which we don’t want anyway), > and o365 is rejecting on that envelope sender/recipient (that it’s > not allowed to deliver to our internal

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-11 Thread Grant Taylor via mailop
On 1/11/23 3:39 AM, Jaroslaw Rafa via mailop wrote: Why? Another primary use case I have is a company owner moved a system from the office to their house as they moved states and the new ISP filters destination TCP port 25. So having something in the mail wrapper being able to communicate

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-11 Thread Grant Taylor via mailop
On 1/11/23 3:39 AM, Jaroslaw Rafa via mailop wrote: Why? Your script will run as a part of existing mail flow anyway, within an existing MTA. Making use of this existing MTA seems to be the logical choice, instead of trying to replicate its function yourself. Consider a scenario where the

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-11 Thread Al Iverson via mailop
I've been doing something similar for a good long time. Blogged about it here: https://www.spamresource.com/2015/12/mail-forwarding-in-dmarc-world.html The current version of my forwarding script rewrites the from address, disables the authentication headers (re-authenticating the message anew

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-11 Thread Jaroslaw Rafa via mailop
Dnia 10.01.2023 o godz. 22:40:56 Grant Taylor via mailop pisze: > > It doesn't help that part of me wants to integrate the SMTP client > into the script instead of relying on the local MTA stack / > infrastructure. Why? Your script will run as a part of existing mail flow anyway, within an

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-10 Thread Grant Taylor via mailop
On 1/10/23 2:59 PM, Dan Mahoney via mailop wrote: Sometimes a problem comes across your desk that you say “wait, how is this not solved yet?”. Ya I too have wanted something like this to enhance ~/.forward files on servers that I manage, while addressing all the problems that you're

Re: [mailop] Simple mailing list expander program for aliases files?

2023-01-10 Thread Simon Lyall via mailop
I remember thining about this about 6 months ago and looking around for a solution. I think I was even going to put it in my "fun projects I could do" list. Best I could find was: https://github.com/zoni/postforward but I didn't test it out. On Tue, 10 Jan 2023, Dan Mahoney via mailop

[mailop] Simple mailing list expander program for aliases files?

2023-01-10 Thread Dan Mahoney via mailop
All, Sometimes a problem comes across your desk that you say “wait, how is this not solved yet?”. At the day job, we have a contact list for our customers that comes from our ticket system, and it’s stuffed into an alias file with :include:. The way postfix handles these aliases, is that it