We recently found that we could no longer use Exim's sender callout
verification on our MX because people here rely on various web services
etc. that send auto-generated messages "from" addresses with incorrect
local parts (and identifying all of them so that exceptions could be
made also seemed difficult.) But, then I thought that I might at least
add a warning if the callout fails, so the check_recipient ACL now has:
require verify = sender
warn !verify = sender/callout=defer_ok
message = X-Sender-Warning: The email setup at
$sender_address_domain does not accept messages to $sender_address
Questions:
1. Does this look correct to you? (Note that I still want to reject
messages if the domain part is incorrect, hence the first test.)
2. What header would you use for this warning?
--
Toralf
