On Tue, Jul 30, 2013 at 6:50 PM, Nigel Rantor wrote:
Looking again now though I see a new thing in their
support sections, DMARC,
which I had not heard of before.
That's unlikely to be relevant for a 'small' domain like yours. With
DMARC you can set policies about your usage of SPF and DKIM and tell
recipients what they should do when they see an email that appears to
come from you that doesn't validate SPF and/or isn't DKIM signed. It
also lets you inform the recipient how they can inform you about such
emails.
As others have pointed out, a lot of spam filters use some kind of
scoring system. A small change in an email - such as a different
sending domain - can push the score over the threshold and make a spam
filter drop the email. (I remember one instance where an email stopped
being accepted if 'photo' was substituted for 'picture'.)
Here you can see that your old domain has ended up on some whitelist,
while your new domain hasn't (yet):
http://multirbl.valli.org/lookup/wiggly.org.html
http://multirbl.valli.org/lookup/allertferret.com.html
(It's just an example - I don't think
junkemailfilter.com is the issue here.)
And yes, a few users unmarking the messages as spam can make a
difference as well.
Martijn.