Re: [exim] bogus? helo godaddy --- <not!>

--On 2 December 2006 16:11:38 -0600 Karl Schmidt <karl@???> wrote:

> We were having a problem with godaddy blocking our emails. They claimed
> we were returning a bogus helo, but it wasn't really about an invalid
> helo between our Exim and their MTA - so I thought I would post it hear
> because godaddy's message is completely misleading - this might save
> someone else some time.
>
> Some of our mail would be sent from a MTA that did not have a MX record
> (This MTA would only respond to our public MTA and LAN computers). I
> suspect they did a reverse call-back based on IP address instead of MX
> record. The fix was routing all mail through our MTA with an MX record.
> In short godaddy appears to block all mail coming from IPs that don't
> have port 25 open.

Really? That would be ridiculous. They'd fail to accept email from some
huge email service providers. It's quite common for large sites to separate
their incoming and outgoing mail servers.

They could be checking that there's a valid A record (or MX record) for
your HELO string.

--
Ian Eiloart
IT Services, University of Sussex