Outbound SMTP

Information about the Outbound SMTP service, how to configure and information on how to setup your account.

How to send mails using your own domain name and Duocircle's Outbound SMTP service on a Hotmail account
Below are the steps on how you can send mails using your own domain name and Duocircle's Outbound SMTP service on your Hotmail account. 1.) Go...
Fri, 1 Feb, 2019 at 8:08 PM
Outbound SMTP European Union / US
If you would like to send email only via a server located in the EU you can use: outbound1.eu.mailhop.org If you would like to send email only via ...
Tue, 13 Feb, 2018 at 3:41 AM
No Longer Listed on RBL but Still Rejecting Email
In some instances, even after an IP has been removed from an RBL the recipient mail server may still reject the message for up to 24 hours.  While the R...
Fri, 1 Feb, 2019 at 8:09 PM
Postfix Configuration
Thank you to Linode for these great instructions - https://www.linode.com/docs/email/postfix/postfix-smtp-debian7 Tested on Ubuntu 14.04LTS DuoCircl...
Fri, 12 May, 2017 at 9:45 PM
Flattening SPF Records
If you are receiving an SPF error with to many queries you can opt to flatten your SPF records with a company like https://www.autospf.com - They will flatt...
Tue, 16 Apr, 2019 at 12:55 PM
Outbound Delivery Issues
If you are having outbound delivery problems including your mail not making it to the inbox, or if you would like to check your DKIM configuration head to  ...
Sun, 6 May, 2018 at 3:31 AM
Headers Added to Messages
We typically do not change/modify provided headers, we just add additional headers (other than the standard MTA headers).   These are the only headers w...
Wed, 25 Jul, 2018 at 4:25 PM
Check to see if a Recipient Domain Exists
Monday, September 10, 2018 We are changing the way that our system functions as of today. We will be validating the To: address on outbound SMTP mes...
Fri, 1 Feb, 2019 at 8:12 PM
This message has been classified as spam. If this is a false positive please open a support ticket referencing message
This solution is related to the "This message has been classified as spam.  If this is a false positive please open a support ticket referencing messag...
Fri, 1 Feb, 2019 at 8:13 PM
Verifying DKIM and SPF records
Send an email to [email protected]  You will get an email back that looks like this: This message is an automatic response from Port...
Sat, 6 Oct, 2018 at 8:38 PM