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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/doc-txt/experimental-spec.txt | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt index 588543454..031c5f4c1 100644 --- a/doc/doc-txt/experimental-spec.txt +++ b/doc/doc-txt/experimental-spec.txt @@ -1146,6 +1146,64 @@ QUIT 221 mail.example.net closing connection +DSN Support +-------------------------------------------------------------- + +DSN Support tries to add RFC 3461 support to Exim. It adds support for +*) the additional parameters for MAIL FROM and RCPT TO +*) RFC complient MIME DSN messages for all of + success, failure and delay notifications +*) dsn_advertise_hosts main option to select which hosts are able + to use the extension +*) dsn_lasthop router switch to end DSN processing + +In case of failure reports this means that the last three parts, the message body +intro, size info and final text, of the defined template are ignored since there is no +logical place to put them in the MIME message. + +All the other changes are made without changing any defaults + +Building exim: +-------------- + +Define +EXPERIMENTAL_DSN=YES +in your Local/Makefile. + +Configuration: +-------------- +All DSNs are sent in MIME format if you built exim with EXPERIMENTAL_DSN=YES +No option needed to activate it, and no way to turn it off. + +Failure and delay DSNs are triggered as usual except a sender used NOTIFY=... +to prevent them. + +Support for Success DSNs is added and activated by NOTIFY=SUCCESS by clients. + +Add +dsn_advertise_hosts = * +or a more restrictive host_list to announce DSN in EHLO answers + +Those hosts can then use NOTIFY,ENVID,RET,ORCPT options. + +If a message is relayed to a DSN aware host without changing the envelope +recipient the options are passed along and no success DSN is generated. + +A redirect router will always trigger a success DSN if requested and the DSN +options are not passed any further. + +A success DSN always contains the recipient address as submitted by the +client as required by RFC. Rewritten addresses are never exposed. + +If you used DSN patch up to 1.3 before remove all "dsn_process" switches from +your routers since you don't need them anymore. There is no way to "gag" +success DSNs anymore. Announcing DSN means answering as requested. + +You can prevent Exim from passing DSN options along to other DSN aware hosts by defining +dsn_lasthop +in a router. Exim will then send the success DSN himself if requested as if +the next hop does not support DSN. +Adding it to a redirect router makes no difference. Certificate name checking -------------------------------------------------------------- |