On Fri, Mar 11, 2016 at 08:57:48AM -0700, @lbutlr wrote:
> I have MX monitoring that says I am not on any blacklists and that the server
> is secure
>
> # dig @8.8.8.8 covisp.net any
My first SMTP connection attempt to your server resulted in:
$ posttls-finger covisp.net
posttls-finger: Connected to mail.covisp.net[65.121.55.42]:25
posttls-finger: < 220-mail.covisp.net ESTMP -- Please wait
<brief delay>
posttls-finger: < 220 mail.covisp.net ESMTP Postfix 3.0.3
...
Subsequent connections yield:
$ posttls-finger covisp.net
posttls-finger: Connected to mail.covisp.net[65.121.55.42]:25
posttls-finger: < 220 mail.covisp.net ESMTP Postfix 3.0.3
...
You have some sort of proxy in front of your Postfix server. The
proxy may be blocking Yahoo's servers.
--
Viktor.
