Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Possible Duplicate:
How to send emails and avoid them being classified as spam

I have a legitimate website that sends out emails using postfix for user signup validation. I am running a VPS with Debian on Linode.

Is there a way to somehow validate my server, so that other servers know I am not sending spam? I don't always want them ending up in the spam folder, especially on gmail.

share|improve this question

marked as duplicate by Ward, Khaled, faker, John Gardeniers, adaptr Jan 8 '13 at 10:59

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

could be many reasons.. badly configured vps (helo/rdns/a-record), bad/missing mail headers from your php script, blacklisted somewhere.. you might want to post more details to get better help (the headers of such a message after is has been received by gmail for example) – Gryphius Jan 8 '13 at 6:59

There are several issues that need to be taken in consideration while sending an email. I have seen that the most common is missing of DKIM (DomainKeys Identified Mail).

To investigate your problem I would suggest you to send an email to . use an email address that you can receive the emails back. will send back an debugging email where you can identify the problems that lead your emails to be marked as spam.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.