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email settings. (General)

posted by Gregory West(R) E-mail, Manitoba Canada, 20.05.2016, 11:31

Yes I am getting back into the eMailing of stuff.

I can tell you for sure, that the IP of the sending eMail server has to match the DNS entry for the eMail server. You can get around this by using the field REPLY-TO: for your main eMail address, and the FROM: for the address on the sending server.

I am having simular issues, I want to send out eMails and have it look like they are coming from a particular user. This way that user will be informed when the eMail fails to be delivered etc. Does SQL Ledger just use the defaults of sendmail when sending to a SMTP server? Can sendmail accept multiple senders (ie the eMail is being send from SQL Ledger on the server, but the return could be one of several people.)

Thanks for the reply DavidJ

My DNS is handled by a separate firewall so I'll have to look there to see
if SPF and DKIM are set.

I'm using sendmail to deliver the mail and I've set the "Smarthost" to that
of my ISP.

I think I've got a naming problem that is the cause but I'm not 100% sure.
All of my internal servers, including the one for SQL-Ledger are behind a
FreeBSD firewall here in my shop. I also have a website that is hosted and
has it's own fixed IP, 'out on the www'

My website address is Companyname.com and resolves to the static IP.

I've named the server inside the firewall Server3.Companyname.com but it's
IP is a 192.168.xxx.xxx address that is a fixed address by the DNS server
that is part of the firewall.

I'm wondering if the fact that the mail is coming from an internal server,
that doesn't have the same IP as the DNS that the name resolves to outside,
is causing some of the better spam filters to reject it.


Hi Jeff
These issues might need to be handled outside SQL-Ledger.
Have you enabled SPF and DKIM records in your DNS settings ?
While providing no guarantees, these records may increase your prospects
successful email delivery to your customers.
What mailserver delivers your outgoing emails ? Exim or Postfix perhaps
Does your mailserver add DKIM headers to your outgoing emails including
Invoices ?

And IF you're also running a public facing webserver, there's other
you can do to confirm email delivery of invoices, statements, etc.

Gregory A. West
DB&W Systems Limited


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