Sendmail emails going to spam

Question

I have sendmail installed on CentOS 6 and whenever I try to send an email, it goes to spam on the recipient. (Gmail in this case)

OK, so, the domain I was to send mail on behalf of is: scalpello.info

The subdomain that is pointed to the ip of the server is: mail.scalpello.info.

Here is a header from a test email that went to spam: http://pastebin.com/iuLUQPzc

Anyone have any ideas?

score 2 · Answer 1 · edited Apr 13 '17 at 12:13

From your headers it appears that your server uses IPv6 to send email to the gmail server.

 Received: from scalpello.info ([2607:5300:100:200::693])

and you have not configured a reverse DNS record for your IPv6 address. And there is no forward IPv6 record for mail.scalpello.info either.

Additionally there's a lot of information in the Canonical question about legitimate email being classified as SPAM and preveting that here.

1 Answers1