similar to: Forcing TLS for SMTP?

I have a goal of securing email. Updated the company mail server and DNS (CentOS 7 + Postfix, otherwise pretty stock) with support for SPF, DKIM, and DMARC. So far, all good, and everything "just works". Our mail server has supported SMTP / TLS for a long time, but recently I've been considering requring TLS all the time. Is there anybody here who's done this? Has it

See bottom post below. On Wednesday, December 4, 2019 2:24:51 PM PST Phil Perry wrote: > On 04/12/2019 22:03, Lists wrote: > > I have a goal of securing email. Updated the company mail server and DNS > > (CentOS 7 + Postfix, otherwise pretty stock) with support for SPF, DKIM, > > and DMARC. So far, all good, and everything "just works". > > > > Our mail

On 04/12/2019 22:03, Lists wrote: > I have a goal of securing email. Updated the company mail server and DNS > (CentOS 7 + Postfix, otherwise pretty stock) with support for SPF, DKIM, and > DMARC. So far, all good, and everything "just works". > > Our mail server has supported SMTP / TLS for a long time, but recently I've > been considering requring TLS all the

In the same vein, I am receiving forensic DMARC reports from mx01.nausch.org. Whenever I send a message to the mailing list or when my server sends a DMARC report, I'm getting a DMARC Forensic report. It's odd, because the actual report tells me both DKIM and SPF (in the the of a DMARC report) pass... Here is what I am getting : This is an authentication failure report for an email

Greetings, I have found an issue in the interaction between sieve vacation messages and the SPF, DKIM and DMARC email validation systems. For example, let's say we have a message coming from a at a.com to b at b.com at a server imap.mydomain.com. The account b at b.com has a vacation rule in sieve, and that generates an autoresponse to a at a.com. Our problem begins with the definition

On Thu, Jul 18, 2024 at 5:14?AM Stuart Henderson <stu at spacehopper.org> wrote: > The mail admins can choose what is covered by the DKIM signature. > In the case of barclays.com there are various headers (which I think > make it through the mailing list untouched) but also the body, which > does not; a footer with the list URL is added. The real issue here is that the Mailman

On 2019-09-17 09:06, Miroslav Geisselreiter wrote: > Hi guys, > > when I send e-mails to CentOS mailing list <centos at centos.org>, I > received DMARC / DKIM failure reports. Is it possible to solve this > problem and if so how? > That is why DMARC took 10 years of heated discussions, before it was actually implemented - in first place by big boys who will never

> Let's say we have dovecot + sieve plugin container. > Dovecot configured to use remote SMTP submission host to send messages: > submission_host = postfix.example.com:587 I reviewed my config to see how i did it. I think you are right and SASL isn't used here. I have dovecot and postfix on the same machine and in dovecot i set submission_host = localhost:25 Then in my

Hi all, We have hit another step change in aggressive anti-spam techniques from major mail providers. Over the past few days, we saw a huge spike in the number of mails we were failing to deliver to GMail and outlook.com in particular. It looks like it is now no longer acceptable for us to break DMARC/DKIM/SPF. These are DNS-based extensions to SMTP, which allow domains to publish policies as to

Hi all, We have hit another step change in aggressive anti-spam techniques from major mail providers. Over the past few days, we saw a huge spike in the number of mails we were failing to deliver to GMail and outlook.com in particular. It looks like it is now no longer acceptable for us to break DMARC/DKIM/SPF. These are DNS-based extensions to SMTP, which allow domains to publish policies as to

Hello Together Please i have new following Error, from DMARC Report, if i check my domain on example mxtoolbox i dont see any problems. Any from you know this Eror report, what i need to do to fix this issue? C:\folder>nslookup 94.237.32.243 Server: dns204.data.ch Address: 211.232.23.124 Name: wursti.dovecot.fi Address: 94.237.32.243

I have a problem with understanding dmarc reports and some features. I attach two reports. First one come from google.com, second one from tumieszkamy.pl. On my server is dns zone of domain kamir-transport.pl but whole mail service is deployed on Google - in dns zone MX points to Google and there are all mailboxes, aliases etc. Last time I have configured dkim and dmarc policies and I got two

Hi guys, when I send e-mails to CentOS mailing list <centos at centos.org>, I received DMARC / DKIM failure reports. Is it possible to solve this problem and if so how? This is the first report: This is an email abuse report for an email message received from IP 208.100.23.70 on Tue, 17 Sep 2019 15:56:25 +0200. The message below did not meet the sending domain's DMARC policy. For

On Thu, 8 Oct 2020 at 17:50, Nicolas Kovacs <info at microlinux.fr> wrote: > Hi, > > This is probably a bit OT, but here goes. > > I've been running our local school's mail server since 2013, with mail > addresses for school staff and some teachers. The server is running CentOS > 7 > with Postfix and Dovecot, and it's a nice no-bullshit configuration with

On 04/04/2015 09:59 AM, Andrew Holway wrote: > Did we work out the technical reason why some users that post to the list > are getting dumped into gmail spam? > > Ta, > > Andrew > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos It is most probably due to the various issues

On Sun, Jan 4, 2015 at 9:27 AM, gene.cumm at yahoo.com <gene.cumm at yahoo.com> wrote: > Test from Yahoo via Android > > --Gene > _______________________________________________ > Syslinux mailing list > Submissions to Syslinux at zytor.com > Unsubscribe or set options at: > http://www.zytor.com/mailman/listinfo/syslinux As some users may already be aware, my test

On Sun, Jan 04, 2015 at 12:14:51PM -0500, Gene Cumm wrote: > On Sun, Jan 4, 2015 at 9:27 AM, gene.cumm at yahoo.com <gene.cumm at yahoo.com> wrote: > > Test from Yahoo via Android > > > > --Gene > > _______________________________________________ > > Syslinux mailing list > > Submissions to Syslinux at zytor.com > > Unsubscribe or set options at:

On Sun, Jan 04, 2015 at 07:37:44PM +0100, Geert Stappers wrote: > On Sun, Jan 04, 2015 at 12:14:51PM -0500, Gene Cumm wrote: <snip/> > > As far as I can tell, GMail does process the SPF/DKIM/DMARC properties > > but ignores Yahoo!'s DMARC policy to reject on failure. > > The Syslinux ML should now be ready for DMARC p=reject > > We shall see how

On 06/17/2018 08:52 AM, Michael Hennebry via CentOS wrote: > I'm petty sure I messed up attributions, so am deleting them. > >>> I believe this is a DMARC issue. Yahoo, among other places, has set >>> their dmarc records to p=reject: > >>> So, if your mail hosting provider enforces dmarc,(gmail does) and you >>> get mail from a list that doesn't

On 06/17/2018 11:13 AM, Alice Wonder via CentOS wrote: > On 06/17/2018 09:11 AM, Alice Wonder via CentOS wrote: >> On 06/17/2018 08:52 AM, Michael Hennebry via CentOS wrote: >>> I'm petty sure I messed up attributions, so am deleting them. >>> >>>>> I believe this is a DMARC issue. Yahoo, among other places, has set >>>>> their dmarc