reject_unknown_sender_domain and TXT record

2017-08-16 Thread Brett @Google
Hello, Recently noticed some "domain not found" errors by reject_unknown_sender_domain in sender_recipient_checks. Following up I noticed : The domain in the From: address has a SPF record (ONLY) : nslookup -q=ANY kent676.kent.gov.uk kent676.kent.gov.uk text = "v=spf1 ip4:194.80.130.18 ip4:2

Postfix, Kerberos and dns_canonicalize_hostname = false

2017-08-16 Thread Robert Marcano
Greetings. I have been using Postfix with Kerberos without problem for a few years. Our setup uses a DNS alias (CNAME) for the hostname. Let call it smtp.example.com, pointing to the real hostname server.example.com. With a default MIT Kerberos client configuration, dns_canonicalize_hostname is t

Re: some questions and problems with postfix

2017-08-16 Thread Alef Veld
Hi Victor, thank you for your kind reply. That explains a lot, i did not know. Also i now realize looking at the timestamps that it is indeed one and the same message. I feel stupid now. But i will remember that inbound smtp is anonymous. Thanks. > On 16 Aug 2017, at 13:40, Viktor Dukhovni wrote

Re: some questions and problems with postfix

2017-08-16 Thread Viktor Dukhovni
> On Aug 16, 2017, at 8:11 AM, Alef Veld wrote: > > 2. Why do i sometimes get a anonymous TLS connection. Inbound SMTP email is "always" anonymous, as servers generally don't and should not request client certificates, and even if they did, clients wouldn't generally be configured to present su

Re: Feature Request: lmtp --> content_filter --> lmtpd

2017-08-16 Thread Viktor Dukhovni
> On Aug 16, 2017, at 1:53 AM, Rick van Rein wrote: > > I was focussing on passing feedback for individual recipients in a > one-by-one fashion from lmtpd back to lmtp, but it is actually even > nicer to do it per group -- so that a resend can be tried for the > group and they get to see each ot

Re: some questions and problems with postfix

2017-08-16 Thread Alef Veld
Hi postfix users, I’m new here. I have setup postfix recently on my AWS instance and things work pretty well. I can read (dovecot) and sent (postfix) and all works well. I experienced some uncertainty lately and i was hoping maybe one of you could assist me, or maybe you experienced this before,