Boris Kovalenko wrote:
>>> require verify = sender/callout=40s,random,defer_ok
You require that remote host accepts random mailboxes, or smtp session
with any of their MX is longer than 40s, thus denying normal sites which
reject random recipients:
http://www.exim.org/exim-html-4.50/doc/html/spec_39.html#IX2458
http://www.exim.org/exim-html-4.50/doc/html/spec_39.html#IX2598
Why Postmaster message - maybe times ago postmaster calluot has been
made and cached, now run " exim_tidydb /var/spool/mail callout "
After that do the smtp session from exim -bhc and report back
Regards,
Andris