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) > <lutz.epperl...@agendo.de> 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/ <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 <http://mxtoolbox.com/ReverseLookup.aspx> 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 > <http://www.openspf.org/SPF_Record_Syntax> correct? Test your SPF record > <http://www.kitterman.com/spf/validate.html> here. Note that TXT is the > correct official record type for SPF. > > · Is your domain's DKIM record <http://www.dkim.org/> correct? This > will significantly improve email deliverability. Test your DKIM record > <https://www.mail-tester.com/spf-dkim-check> here. > > · If you run your own mail server, check to make sure the IPs of your > mail server are not on any email blacklists > <http://whatismyipaddress.com/blacklist-check>. 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 > <http://www.mail-tester.com/> to verify that all the above is working > correctly. > > I recommend mail-tester.com <http://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 ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **********************************************************************
