Re: [exim] sender verify callout to non smtp source

On Wed, Mar 09, 2005 at 10:11:40AM -0000, Dermot Paikkos wrote:
> Our web site (externally hosted) uses a plugin to send emails to
> clients. One client's server (exim 4.34) is rejecting the mails with
> a sender verify message. From my understanding of it, with sender
> verify the server does a callout to the sending host. Is that
> correct?

It does a callout verification against the MX servers for the domain
of the envelope sender.

> In this case the server will not respond as it isn't a smtp server.
> Does anyone have any ideas on how to get around this? From my reading
> of the docs an mx record for that hosts will not work as it will call
> the sending host only.

There is only one solution. Use a valid envelope sender address.

If you're sending mail from user@???, then not
only are you sending from an address which is non-returnable, but
you're also not conforming to generally accepted RFCs, which (eg)
indicate that postmaster@that domain must work.

It sounds like you need to tweak your plugin configuration to set
the sender address appropriately.

--
Russell King