deliveries if the configuration allows a delivery attempt as soon as a message
is received.
+See also the &%max_parallel%& generic transport option,
+and the &%serialize_hosts%& smtp transport option.
+
.cindex "number of deliveries"
.cindex "delivery" "maximum number of"
If you want to control the total number of deliveries on the system, you
for the lifetime of the client connection (including during authentication).
.new
-If DAVE validated the connection attempt then the value of the &%tls_sni%& option
+If DANE validated the connection attempt then the value of the &%tls_sni%& option
is forced to the domain part of the recipient address.
.wen
Signing is enabled by setting private options on the SMTP transport.
These options take (expandable) strings as arguments.
-.option dkim_domain smtp string list&!! unset
+.option dkim_domain smtp "string list&!!" unset
The domain(s) you want to sign with.
After expansion, this can be a list.
Each element in turn,
If it is empty after expansion, DKIM signing is not done,
and no error will result even if &%dkim_strict%& is set.
-.option dkim_selector smtp string list&!! unset
+.option dkim_selector smtp "string list&!!" unset
This sets the key selector string.
After expansion, which can use &$dkim_domain$&, this can be a list.
Each element in turn is put in the expansion
.code
#macro
SRS_SECRET = <pick something unique for your site for this. Use on all MXs.>
-
+
#routers
outbound:
transport = ${if eq {$local_part@$domain} \
{$original_local_part@$original_domain} \
{remote_smtp} {remote_forwarded_smtp}}
-
+
inbound_srs:
driver = redirect
senders = :
# detect inbound bounces which are SRS'd, and decode them
condition = ${if inbound_srs {$local_part} {SRS_SECRET}}
data = $srs_recipient
-
+
inbound_srs_failure:
driver = redirect
senders = :
#... further routers here
-
+
# transport; should look like the non-forward outbound
# one, plus the max_rcpt and return_path options
remote_forwarded_smtp: