We have just sent out our first batch of EDM and it was a disaster. Most of our hotmails mails are directed into the Spam folder. Hence we decided to take steps to improve our SMTP server’s credibility.
Below listed some of the steps that we took:
1) Use online tools to determine your Smtp server status
Below are some of the online tools that we have used:
- MxToolbox – checks for Reverse DNS, SMTP Banner, SMTP Open Relay
- What is my IP Address – verify if your existing server IP has been blacklisted
2) Ensure that Reverse DNS is been setup
Usually the Reverse DNS is been setup for you when you have signed up a hosting plan with your hosting company. Else you can always try to contact them for it. Use the MxToolbox to determine if your Reverse DNS is been set up.
3) Ensure that SMTP Open Relay is been disabled
SMTP Open Relay allows anyone on the internet to connect and send email with it. This is usually typically used or exploit by spammers, hence it is important to disable it (something that mail providers hated as well). Run MxToolbox to ensure that your SMTP Open Relay has been disabled.
4) Ensure that the SPF record is been setup
To determine if the SPF record is been setup, send an email from your SMTP server to your personal email. Open and view the email’s source and search for a keyword called “Received-SPF” (In Gmail, click on “Show original”). If you see similar sentence as follows, this means that your SPF record is not been setup:
Received-SPF: pass (google.com: domain of auto@loveatsg.com designates xxx.xxx.xxx.xxxx as permitted sender)
client-ip=xxx.xxx.xxx.xxx;
Below are a few links that we have used/reference when we configured our SPF record:
- SPF Tutorial – A quick tutorial reference of the SPF syntax
- SPF Policy Tester – Before you register your SPF record, remember to test it out using this online tester tool
Below is our SPF syntax:
v=spf1 a:loveatsg.com ~all
5) Tips with Hotmail
If you are using your web provider’s smtp server to send out mails to your members, there are high chances that your mail will be send directly to their Junk mail.
Do the following options to get into their good boots:
- Always read their latest Senders guidelines.
- Sign up for Junk Email Reporting Program, so that you are able to identify unwanted subscribers who identified your mail as junk
6) Tips with Google (Gmail)
In rare occasion, we have cases where Google will deny our mails a place in our member’s mailbox (even not in their Spam folder).
If you are having problems with Google, do the following:
- Always read their latest Senders guidelines.
- Contact Google team about it.