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https://issues.apache.org/jira/browse/JAMES-3431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17242907#comment-17242907
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Benoit Tellier commented on JAMES-3431:
---------------------------------------
I enhanced https://github.com/linagora/james-project/pull/4099 to add
DsnParameters to the Mail object.
To do so I leveraged mail attributes. In order to be as strong typed (and safe)
as possible I leverage collections AttributeValues.
However some implementations do break, as they (still!) rely on java
serialization despite recent work on
https://issues.apache.org/jira/browse/JAMES-2578 .
The current work is working with RabbitMQ & memory mail queues but is not
supported by file & jms implementations.
Here are the options we have:
- Accept DSN feature do not work on tese implementations (not my prefered at
all!)
- Re-implement DSNParameters attribute mapping to not use collection
attributeValues. This work around the main issue for this specific use case of
attribute values. (I feel okay with that)
- Try to fix collection attributeValue java serialization is likely hard to
do, but also keeps java serialization around for longer in the code base.
Likely a dead-end.
- No longer rely on Java serialization for "JMS" & "File" mail queues. This
means either smart fallback code, or at worst an upgrade path with an empty
mail queue. That is by far my prefered option, and I will start community
discussions in that direction.
> Relay DSN options on RemoteDelivery
> -----------------------------------
>
> Key: JAMES-3431
> URL: https://issues.apache.org/jira/browse/JAMES-3431
> Project: James Server
> Issue Type: Bug
> Components: Remote Delivery, SMTPServer
> Affects Versions: 3.5.0
> Reporter: Karsten Otto
> Priority: Major
>
> Since James claims to support the DSN SMTP extension, it may receive a mail
> submission according to [RFC 3461|https://tools.ietf.org/html/rfc3461]:
> {code:java}
> MAIL FROM:<al...@example.org> RET=HDRS ENVID=QQ314159
> RCPT TO:<d...@ivory.edu> NOTIFY=SUCCESS,FAILURE,DELAY
> ORCPT=rfc822;d...@ivory.edu
> RCPT TO:<f...@bombs.af.mil> NOTIFY=NEVER{code}
> In this case James should
> * remember the given DSN options (NOTIFY, ORCPT, RET, ENVID) for each
> recipient, and
> * provide the same options when relaying the mail to remote servers via the
> RemoteDelivery mailet.
> (The DSN options should be accessible to other interested mailets as well,
> e.g. for bounce processing.)
> Possibly related issues:
> https://issues.apache.org/jira/browse/JAMES-322
> https://issues.apache.org/jira/browse/JAMES-362
>
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