Hey everyone,
I’m starting to pull my hair out with Clients moaning because their emails are ending up in the junk filters or not delivered at all.
Initially, we started up with just a simple Ubuntu server running Postfix. Then we noticed that because we were on a Dynamic IP provided by our ISP, we were getting blacklisted.
We then purchased a static IP, which for a month or two worked great.
Now it appears we are getting blocked again.
I’ve done some investigation and we have done the following:
Setup Postfix with DK-Milter
Signed up for SecureID for the domain of the SMTP server
Setup SPF records on domain of the SMTP server and also of the domain we’re sending on behalf of.
When running our tests, we get a spam assassin rating of 0.2 for our emails yet it still appears in most, if not all spam filters.
SPF confirms it’s working:
Received-SPF: pass (google.com: domain of enquiries@domain.com designates xx.xxx.xx.xxx as permitted sender) client-ip=xx.xxx.xx.xxx;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of enquiries@domain.com designates xx.xxx.xx.xxx as permitted sender) smtp.mail=enquiries@domain.com
What else can we do? I’m not sure what we can do with regards to DKIM/Secure ID. They are setup but I have not been able to confirm they are working.
Any idea’s would be appreciated!
Cheers
Gavin