On 16 Sep 2019, at 13:47, Paul van der Vlis
wrote:
How can I refuse mail from hosts who don't have an open port 25?
On 16 Sep 2019, at 9:17, Kevin A. McGrail wrote:
Paul, I wrote a module which I need to update on Perl's CPAN called
Net::validMX that we use to reject IPv4 domains that aren'
> How can I refuse mail from hosts who don't have an open port 25?
>
> What do you think from such a check?
i have tried this, it's not useful, so i didn't leave the check in
place
it's very common, perhaps even the norm that the IP address which
delivers mail to me itself will not accept an inco
On Sep 16, 2019, at 7:17 AM, Paul van der Vlis wrote:
> I guess only the big providers will have different servers for inbound and
> outbound email, and you can make a list of them.
No, lots and lots of servers will have these services separated.
--
Today the road all runners come/Shoulder
+1
Back when I was a Web Hosting monkey, I had something like 23 separate
mail servers (Plesk/qmail and CPanel/exim) trying to send mail to the
world. After some of the servers getting blacklisted for one reason or
another, I decided to use a pair of Postfix servers to send outgoing mail.
Incomi
Kevin A. McGrail skrev den 2019-09-16 17:47:
Benny, you and I correspond and I use the netValidMX. Not sure what
you
are trying to say.
Thanks to Bill showing validMX is not broken, all good with it, but
http://mailtester.com is not good, i like to be neutral with
https://www.mail-tester.c
Bill Cole skrev den 2019-09-16 17:47:
On 16 Sep 2019, at 11:00, Benny Pedersen wrote:
Kevin A. McGrail skrev den 2019-09-16 16:19:
Fair enough. Maybe he should turn that feature on then :-)
if you do you cant recieve email from me
validMX is strict to say domains without MX is invalid doma
On 9/16/2019 11:00 AM, Benny Pedersen wrote:
> Kevin A. McGrail skrev den 2019-09-16 16:19:
>> Fair enough. Maybe he should turn that feature on then :-)
>
> if you do you cant recieve email from me
>
> validMX is strict to say domains without MX is invalid domain ?
>
> oh and MX failback is not a
On 16 Sep 2019, at 11:00, Benny Pedersen wrote:
> Kevin A. McGrail skrev den 2019-09-16 16:19:
>> Fair enough. Maybe he should turn that feature on then :-)
>
> if you do you cant recieve email from me
>
> validMX is strict to say domains without MX is invalid domain ?
No, it does not do that.
Kevin A. McGrail skrev den 2019-09-16 16:19:
Fair enough. Maybe he should turn that feature on then :-)
if you do you cant recieve email from me
validMX is strict to say domains without MX is invalid domain ?
oh and MX failback is not a rfc ?
be carefull testing with "sendmail -bv u...@exam
Fair enough. Maybe he should turn that feature on then :-)
On 9/16/2019 9:59 AM, Bill Cole wrote:
>
> I don't believe that Net::validMX does anything more *at the domain
> level* than Postfix's built-in reject_unknown_sender_domain
> restriction. Its check_email_validity() may be a bit more stric
On 16 Sep 2019, at 9:17, Paul van der Vlis wrote:
I guess only the big
providers will have different servers for inbound and outbound email,
and you can make a list of them.
Bad guess.
Many business email systems are architected this way for security
purposes (e.g. Exchange is fine for sendi
On 16 Sep 2019, at 9:17, Kevin A. McGrail wrote:
On 9/16/2019 9:03 AM, Jim Reid wrote:
On 16 Sep 2019, at 13:47, Paul van der Vlis
wrote:
How can I refuse mail from hosts who don't have an open port 25?
Paul, I wrote a module which I need to update on Perl's CPAN called
Net::validMX that we
Paul van der Vlis:
> The outbound server has a closed port 25?
More likely, blocked by firewall.
Wietse
Op 16-09-19 om 15:25 schreef Scott Kitterman:
> On Monday, September 16, 2019 9:17:00 AM EDT Paul van der Vlis wrote:
>> I know a provider what is actually using this. I guess only the big
>> providers will have different servers for inbound and outbound email,
>> and you can make a list of them.
>
On Monday, September 16, 2019 9:17:00 AM EDT Paul van der Vlis wrote:
> I know a provider what is actually using this. I guess only the big
> providers will have different servers for inbound and outbound email,
> and you can make a list of them.
This is not true. My domain is about as tiny as th
> On 16 Sep 2019, at 14:17, Paul van der Vlis wrote:
>
>> A significant number of installations will use different servers for
>> inbound and outbound email.
>
> I know a provider what is actually using this. I guess only the big
> providers will have different servers for inbound and outboun
Op 16-09-19 om 14:53 schreef John Peach:
> On 9/16/19 8:47 AM, Paul van der Vlis wrote:
>> Hello,
>>
>> How can I refuse mail from hosts who don't have an open port 25?
>>
>> What do you think from such a check?
>
>
> DO NOT DO THIS!
>
> A significant number of installations will use differen
On 9/16/2019 9:03 AM, Jim Reid wrote:
> On 16 Sep 2019, at 13:47, Paul van der Vlis wrote:
>
> How can I refuse mail from hosts who don't have an open port 25?
Paul, I wrote a module which I need to update on Perl's CPAN called
Net::validMX that we use to reject IPv4 domains that aren't properly
s
> On 16 Sep 2019, at 13:47, Paul van der Vlis wrote:
>
> How can I refuse mail from hosts who don't have an open port 25?
>
> What do you think from such a check?
It’s a stunningly bad idea. Don’t do it.
Many enterprises and cloud-based mail providers have discrete servers/systems
handling
Hi
on 2019/9/16 20:47, Paul van der Vlis wrote:
How can I refuse mail from hosts who don't have an open port 25?
What do you think from such a check?
You shouldn't.
Many email systems have delivery agent and MTA to be separated.
That's to say, they get incoming mails from MTA which has port
On 9/16/19 8:47 AM, Paul van der Vlis wrote:
Hello,
How can I refuse mail from hosts who don't have an open port 25?
What do you think from such a check?
DO NOT DO THIS!
A significant number of installations will use different servers for
inbound and outbound email. What is worth checking,
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