Author: John Winters Date: To: users Subject: Re: [bitfolk] Email - getting out of spam filters
On 31/07/13 00:43, Nigel Rantor wrote:
[snip] > Yeah, the easiest for me was to tell exim not to use ipv6 for now.
>
> First email I tried via mail client got through okay.
>
> First email I tried through the automated system that runs behind
> alertferret.com failed but the message displayed in gmail as to why this
> message was marked as spam was different, it now says it is spam because
> it is like other messages that have been marked as spam.
I recently had much the same problem and for the same reason. Gmail -
having been very good about not mis-classifying e-mail as spam -
suddenly started filing all stuff from my domain as spam. The reason as
it turned out was because the e-mail was indeed going via IPv6 and my
SPF record didn't list my IPv6 address.
In the course of investigating I found a very useful site. Send an
e-mail to check-auth@??? and you get back an automated
acknowledgement telling you how well it did in security checks. It
covers SPF, DKIM and other bits.
I both fixed my SPF (by adding an IPv6 record to my host name) and added
DKIM signing to my outgoing e-mails. Google is now a happy bunny again.
$ host -t txt sinodun.org.uk
sinodun.org.uk descriptive text "v=spf1 a:ntp.sinodun.org.uk
a:nimbus.sinodun.org.uk ~all"
$ host nimbus.sinodun.org.uk
nimbus.sinodun.org.uk has address 85.119.83.78
nimbus.sinodun.org.uk has IPv6 address 2001:ba8:1f1:f187::2
nimbus.sinodun.org.uk mail is handled by 10 nimbus.sinodun.org.uk.
$
