[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). Su

Re: [Mailman-Users] DMARC hack

2015-05-24 Thread Allan Hansen
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 addresses, to be safe

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 fo

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 I

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 DM

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\; ru

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