diff options
Diffstat (limited to 'doc/doc-docbook')
| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index ae4d75ecb..2b055c3e9 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -27330,8 +27330,12 @@ from one SMTP connection to another. If a recipient-verify callout connection i requested in the same ACL it is held open and used for the data, otherwise one is made after the ACL completes. -Note that routers are used in verify mode. Note also that headers cannot be +Note that routers are used in verify mode, +and cannot depend on content of received headers. +Note also that headers cannot be modified by any of the post-data ACLs (DATA, MIME and DKIM). +Headers may be modified by routers (subject to the above) and transports. + Cutthrough delivery is not supported via transport-filters or when DKIM signing of outgoing messages is done, because it sends data to the ultimate destination before the entire message has been received from the source. |