Re: sending mail with Exchange server

[Koen Van Hooreweghe via 4D_Tech]

Pretty weird, this message arrived in my spam (Apple Mail)...

Kind regards,
Koen

Op 10-mrt.-2017, om 16:06 heeft Randy Jaynes via 4D_Tech <4d_tech@lists.4d.com> 
het volgende geschreven:

> Thanks, Lutz.
> 
> Will look into these.
> 
> I know it’s a Pandora’s box and it gets very frustrating, for sure. So many 
> variables.
> 
> I suspect something on Exchange, but I’m told it’s managed by Comcast, so 
> it’s not going to be fun getting any changes made that we might need.
> 




Compass bvba
Koen Van Hooreweghe
Kloosterstraat 65
9910 Knesselare
Belgium
tel +32 495 511.653

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RE: sending mail with Exchange server

[Epperlein, Lutz (agendo) via 4D_Tech]

Hi,



you just opened the whole box of Pandora regarding email sending. In the last 
years more and more techniques are evolved to prevent spam, SPF, DKIM, DMARC to 
name a view. And if someone argue "it worked in the past for years" it is the 
best sign, there could be something wrong. We are not anymore in the past ...



But seriously, email sending is a complex thing. If someone gets the mail in 
the spam folder and someone not, it is as best a sign, that in the second case 
is something wrong with email configuration on the server side.

As an example, there is an interesting software called Discourse 
(http://www.discourse.org/) which heavily based on sending of emails. They give 
you interesting hints what to do to get the emails running. I quote it here:

Email deliverability is complicated. Here are a few important things you should 
check first:

·Be sure to set the notification email from: address correctly in your 
site settings. The domain specified in the "from" address of the emails you 
send is the domain your email will be validated against.

·Know how to view the raw source of the email in your mail client, so 
you can examine email headers for important clues. in Gmail, it is the "show 
original" option in the drop-down menu at the top right of each mail.

·IMPORTANT: Does your ISP have a reverse DNS record entered to 
associate the domain names and IP addresses you send mail from? Test your 
Reverse PTR record here. If your ISP 
does not enter the proper reverse DNS pointer record, it's very unlikely any of 
your email will be delivered.

·Is your domain's SPF record 
correct? Test your SPF record here. 
Note that TXT is the correct official record type for SPF.

·Is your domain's DKIM record correct? This will 
significantly improve email deliverability. Test your DKIM 
record here.

·If you run your own mail server, check to make sure the IPs of your 
mail server are not on any email 
blacklists. Also verify that it 
is definitely sending a fully-qualified hostname that resolves in DNS in its 
HELO message. If not, this will cause your email to be rejected by many mail 
services.

·We highly recommend you send a test email to 
mail-tester.com to verify that all the above is 
working correctly.

I recommend mail-tester.com too. It helps really and gives you exact steps to 
solve problems. The most problem are to solved on the sender’s side.



Regards

Lutz
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Re: sending mail with Exchange server

[Randy Jaynes via 4D_Tech]

Thanks, Lutz.

Will look into these.

I know it’s a Pandora’s box and it gets very frustrating, for sure. So many 
variables.

I suspect something on Exchange, but I’m told it’s managed by Comcast, so it’s 
not going to be fun getting any changes made that we might need.

Randy

--
Randy Jaynes
Senior Programmer and Customer Support

http://printpoint.com • (845) 359-0298 • PrintPoint, Inc • 57 Ludlow Lane • 
Palisades, NY 10964 




> On Mar 10, 2017, at 9:55 AM, Epperlein, Lutz (agendo) 
>  wrote:
> 
> Hi,
>  
> you just opened the whole box of Pandora regarding email sending. In the last 
> years more and more techniques are evolved to prevent spam, SPF, DKIM, DMARC 
> to name a view. And if someone argue "it worked in the past for years" it is 
> the best sign, there could be something wrong. We are not anymore in the past 
> ...
>  
> But seriously, email sending is a complex thing. If someone gets the mail in 
> the spam folder and someone not, it is as best a sign, that in the second 
> case is something wrong with email configuration on the server side. 
> As an example, there is an interesting software called Discourse 
> (http://www.discourse.org/ ) which heavily based 
> on sending of emails. They give you interesting hints what to do to get the 
> emails running. I quote it here:
> Email deliverability is complicated. Here are a few important things you 
> should check first:
> 
> ·Be sure to set the notification email from: address correctly in 
> your site settings. The domain specified in the "from" address of the emails 
> you send is the domain your email will be validated against.
> 
> ·Know how to view the raw source of the email in your mail client, so 
> you can examine email headers for important clues. in Gmail, it is the "show 
> original" option in the drop-down menu at the top right of each mail.
> 
> ·IMPORTANT: Does your ISP have a reverse DNS record entered to 
> associate the domain names and IP addresses you send mail from? Test your 
> Reverse PTR record  here. If your 
> ISP does not enter the proper reverse DNS pointer record, it's very unlikely 
> any of your email will be delivered.
> 
> ·Is your domain's SPF record 
>  correct? Test your SPF record 
>  here. Note that TXT is the 
> correct official record type for SPF.
> 
> ·Is your domain's DKIM record  correct? This 
> will significantly improve email deliverability. Test your DKIM record 
>  here.
> 
> ·If you run your own mail server, check to make sure the IPs of your 
> mail server are not on any email blacklists 
> . Also verify that it is 
> definitely sending a fully-qualified hostname that resolves in DNS in its 
> HELO message. If not, this will cause your email to be rejected by many mail 
> services.
> 
> ·We highly recommend you send a test email to mail-tester.com 
>  to verify that all the above is working 
> correctly.
> 
> I recommend mail-tester.com  too. It helps really 
> and gives you exact steps to solve problems. The most problem are to solved 
> on the sender’s side.
>  
> Regards
> Lutz

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