[Mailman-Users] DMARC hack

2015-05-24 Thread Stephen J. Turnbull
Allan Hansen writes: 69,74d68 # Added to deal with DMARC issuej name, addrs = parseaddr(msg.get('from')) addrs += '.invalid' This is known to be a bad idea, as it increases the spam score at many sites (because the author's mail domain doesn't resolve).

Re: [Mailman-Users] DMARC hack

2015-05-24 Thread Stephen J. Turnbull
Allan Hansen writes: Checking for aol.com and yahoo.com here alone will not work. I have a bunch of other subscribers that have accounts with providers that are owned by Yahoo (mostly) and AOL, but whose addresses are not of this form. Oddly enough, it turns out that they only use DMARC

Re: [Mailman-Users] DMARC hack

2015-05-24 Thread Andrew Hodgson
Allan Hansen wrote: Stephen, Much appreciated. Checking for aol.com and yahoo.com here alone will not work. I have a bunch of other subscribers that have accounts with providers that are owned by Yahoo (mostly) and AOL, but whose addresses are not of this form. I would have to do this for all

Re: [Mailman-Users] DMARC hack

2015-05-24 Thread Allan Hansen
Hi Stephen, Yes, there is a good reason. I’m using Mailman as it came with the OS X Server and am not prepared to replace it. Also, Mailman no longer comes pre-installed on the Apple platform, so I’m basically stuck. This is why I tried the simplest hack I could find. I have 44 busy lists and

Re: [Mailman-Users] DMARC hack

2015-05-24 Thread Allan Hansen
I wonder why then I got a bunch of issues with btopenworld.com, which apparently is Yahoo based. I just checked btopenworld.com with the ‘host’ command and as you say, it has no ‘reject’: $ host -t TXT _dmarc.btopenworld.com _dmarc.btopenworld.com descriptive text v=DMARC1\; p=none\; fo=1\;

Re: [Mailman-Users] DMARC hack

2015-05-24 Thread Mark Sapiro
On 05/24/2015 03:19 PM, Allan Hansen wrote: $ host -t TXT _dmarc.btopenworld.com _dmarc.btopenworld.com descriptive text v=DMARC1\; p=none\; fo=1\; rua=mailto:dmarc...@btinternet.com, mailto:dmarc_...@auth.returnpath.net\;; The domain publishes DMARC p=none. Thus, no ISP should treat a