JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
now classed as a protocol error and subject to smtp_max_synprot_errors.
JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
now classed as a protocol error and subject to smtp_max_synprot_errors.