Gregg Berkholtz wrote: > After making the jump from Exim 3.35 to 4.60, my callouts are behaving
> differently than expected. As they no longer appear to be checking the
> domains MX, and instead perform callouts either back to the connecting
> host, or hostname in the email address.
With 'verify = sender/callout', exim does check the host named in the MX
record. I had the same impression that the sending host rather than the
MX records are used for the callout when tracing a problem last week,
but it turned out to definitely use the MXs.
Check out the docs for the options your using on the callout. I guess
your problem might be there.
You can disable the callout cache by setting the timeout to 1 minute to
force actual callouts being made. Then you can telnet into the SMTP port
of the mail server and type SMTP commands manually to have a sending
address verified. If you telnet from an address outside your LAN, exim
will make a callout and print out an error message stating the IP that
was questioned when making the callout. You will find that it questions
the address obtained from the MX record.
