Email Bounceback

Normally you would start in the postfix log but my beginner suggestion would be to use hosted smtp like gmail. Email is complicated, especially if you have no programmers or sysadmins.

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The receiving server thinks your message is spam. There are lots of possible reasons why this happens, but the reality is that if you run your own mailserver things like this will come up on a near-constant basis and there is often nothing you can do about it.

If you want to roll up your sleeves and start learning, you are in the right place. If you'd rather just click "send" and let the email fairy handle it from there, then gmail et al. are your new best friends.

@Stever:

If you want to roll up your sleeves and start learning, you are in the right place. If you'd rather just click "send" and let the email fairy handle it from there, then gmail et al. are your new best friends.

Sleeves rolled up…

First things to check:

1) Is your IP address on any public blacklists?

2) Do you have matching forward and reverse DNS set for your IP?

 $ host mail.example.com
mail.example.com has address 1.2.3.4
 $ host 1.2.3.4
4.3.2.1.in-addr.arpa domain name pointer mail.example.com.

3) Does your mailserver announce itself (HELO) as the same hostname given by step 2?

 $ telnet mail.example.com 25
Trying 1.2.3.4...
Connected to mail.example.com.
Escape character is '^]'.
220 mail.example.com ESMTP Postfix

4) Is your email advertising Rolex watches or herbal enhancements of any kind? ;)

Whats your server ip address, and the domain you're sending from?