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https://issues.apache.org/jira/browse/JAMES-1694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17139035#comment-17139035
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Benoit Tellier commented on JAMES-1694:
---------------------------------------
https://tools.ietf.org/html/rfc1939#section-9
States that:
{code:java}
Minimal POP3 Commands:
USER name valid in the AUTHORIZATION state
PASS string
QUIT
STAT valid in the TRANSACTION state
LIST [msg]
RETR msg
DELE msg
NOOP
RSET
QUIT
Optional POP3 Commands:
APOP name digest valid in the AUTHORIZATION state
TOP msg n valid in the TRANSACTION state
UIDL [msg]
POP3 Replies:
+OK
-ERR
{code}
CAPA command is defined in https://tools.ietf.org/html/rfc2449 POP3 Extension
Mechanism
{code:java}
A capability description MUST document in which states the capability
is announced, and in which states the commands are valid.
{code}
Reading TOP description for instance:
https://tools.ietf.org/html/rfc2449#section-6.1
{code:java}
Announced states / possible differences:
both / no
Commands valid in states:
TRANSACTION
{code}
So your report is likely valid (I'm sadly not POP3 fluent...)
Reading TopCmdHandler code:
{code:java}
@Override
public Set<String> getImplementedCapabilities(POP3Session session) {
if (session.getHandlerState() == POP3Session.TRANSACTION) {
return CAPS;
} else {
return Collections.emptySet();
}
}
{code}
likely needs to be modified.
> POP3 CAPA command returns different capabilities in different states.
> ---------------------------------------------------------------------
>
> Key: JAMES-1694
> URL: https://issues.apache.org/jira/browse/JAMES-1694
> Project: James Server
> Issue Type: Bug
> Components: POP3Server
> Affects Versions: 3.0.0-beta5
> Environment: Linux
> Reporter: Sandeep Savarala
> Priority: Critical
>
> After you connect to the POP3 server and issue CAPA command it returns:
> capa
> +OK Capability list follows
> PIPELINING
> USER
> STLS
> .
> After you authenticate it returns additional UIDL capability.
> capa
> +OK Capability list follows
> PIPELINING
> USER
> UIDL
> TOP
> .
> The CAPA command should return the same output in any state.
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