I am sending my newsletters or promotional emails from my postfix ubuntu 12.04 server.
Most of mails are delivers in spam mostly in gmail. I have implemented the SPF & yahoo shows some error in spf but still mails are delivering in inbox & Gmail shows SPF Passed & mails are marked as spam.
Yahoo Header -: Received-SPF: permerror (encountered permanent error during SPF processing of domain of mailer.example.com )
Gmail Header -: Received-SPF: pass (google.com: domain of firstname.lastname@example.org designates xx.xxx.xxx.xxx as permitted sender) client-ip=xx.xxx.xxx.xxx;
Please suggest how can I control spamming & What are the best practices.
These are other Hints i have followed.
- I have setup DNS & Ptr Record Properly.
- Implemented the SPF Record
- IP is not listed in Spamming List.
- I have filled the yahoo bulk sender form for yahoo ( I am loooking similar service for gmail, rediff, aol).