Over the past few years, the exponential increase in the volume of spam has forced email service providers to apply increasingly aggressive filtering solutions which sometimes exclude legitimate emails. In order to reduce the chances that your emails are perceived as spam from major suppliers such as Yahoo, Hotmail, Google or AOL, please make sure your server meets the following qualifications :
1) A valid “PTR” Record (Reverse-DNS) is configured on your IP address.
A PTR Record is essentially the hostname that is shown when a reverse lookup query is done on an IP address. This type of query is always done by default and the result is shown in email headers. Having a configured or customized PTR record will help giving your server more credibility when sending emails.
You will also need ABUSE@DOMAIN.TLD and POSTMASTER.TLD for EACH hosted domain.
An optimal PTR record would be the server’s principal hosted domain.
You can have your Reverse DNS configured or changed by opening an assistance request with our system administration team.
2) The email addresses: abuse@.tld, postmaster@.tld should be working.
Feedback loop is an email address used to report spam abuses for a certain IP address. This address is abuse@ and/or postmaster@. AOL asks that these account exists and that they accepts emails.
3) A “TXT” DNS entry that contains a valid SPF record is configured for the domains hosted on your server.
By default, anyone can send emails from any domains by spoofing email addresses. A SPF record will restrict the IP addresses or hostnames allowed to send e-mails from the domains it will be configured on.
You can generate a SPF record by using the OpenSPF Wizard.
By having the two conditions above met, the verifications made by the email service providers are likely to determine that your IP address can be trusted and will refer to other criteria to verify wether a specific email is considered unsolicited.
If you wish to know more about how email delivery works and ways to raise your delivery rate, you can review the following website: http://www.saas.nsw.edu.au/solutions/dns.html
Do not hesitate to contact our team if you have any questions or require assistance.