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diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 862c8f91d..44a274b98 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -23799,6 +23799,7 @@ of the message. Its value must not be zero. See also &%final_timeout%&.
 .option dkim_canon smtp string&!! unset
 .option dkim_strict smtp string&!! unset
 .option dkim_sign_headers smtp string&!! unset
+.option dkim_hash smtp string&!! sha256
 DKIM signing options.  For details see section &<<SECDKIMSIGN>>&.
 
 
@@ -38525,13 +38526,15 @@ while expanding the remaining signing options.
 .wen
 If it is empty after expansion, DKIM signing is not done.
 
-.option dkim_selector smtp string&!! unset
+.option dkim_selector smtp string list&!! unset
 This sets the key selector string.
-You can use the &%$dkim_domain%& expansion variable to look up a matching selector.
-The result is put in the expansion
+.new
+After expansion, which can use &$dkim_domain$&, this can be a list.
+Each element in turn is put in the expansion
 variable &%$dkim_selector%& which may be used in the &%dkim_private_key%&
 option along with &%$dkim_domain%&.
-If the option is empty after expansion, DKIM signing is not done.
+If the option is empty after expansion, DKIM signing is not done for this domain.
+.wen
 
 .option dkim_private_key smtp string&!! unset
 This sets the private key to use.
@@ -38569,6 +38572,12 @@ list of header names. Headers with these names will be included in the message
 signature.
 When unspecified, the header names recommended in RFC4871 will be used.
 
+.new
+.option dkim_hash smtp string&!! sha256
+Can be set alternatively to &"sha1"& to use an alternate hash
+method.  Note that sha1 is now condidered insecure, and deprecated.
+.wen
+
 
 .section "Verifying DKIM signatures in incoming mail" "SECID514"
 .cindex "DKIM" "verification"
@@ -38578,7 +38587,7 @@ Verification of DKIM signatures in SMTP incoming email is implemented via the
 syntactically(!) correct signature in the incoming message.
 A missing ACL definition defaults to accept.
 If any ACL call does not accept, the message is not accepted.
-If a cutthrough delivery was in progress for the message it is
+If a cutthrough delivery was in progress for the message, that is
 summarily dropped (having wasted the transmission effort).
 
 To evaluate the signature in the ACL a large number of expansion variables