[Solved] sendMail not working: any idea?

Sorry for a so basic question but I don’t find why I can’t send mail from openHAB.

My setup:

######################## Mail Action configuration ####################################
#
# The SMTP server hostname, e.g. "smtp.gmail.com"
mail:hostname=smtp.free.fr

# the SMTP port to use (optional, defaults to 25 (resp. 587 for TLS))
#mail:port=

# the username and password if the SMTP server requires authentication
#mail:username=
#mail:password=

# The email address to use for sending mails
mail:from=myemail1@free.fr

# set to "true", if TLS should be used for the connection
# (optional, defaults to false)
#mail:tls=true

# set to "true", if POP before SMTP (another authentication mechanism)
# should be enabled. Username and Password are taken from the above
# configuration (optional, default to false)
#mail:popbeforesmtp=

And here is my rule:

rule "Test mail"
when
    Item SendMail changed
then
    logInfo("SendMail","Test send mail")
    sendMail("myemail2@free.fr", "test", "test mail")
end

In the logs, there is nothing wrong (no error), I even see that the mail is sent.
But then when I consult my e-mails, I see no new message !

I tried with and without TLS. In each case, the SMTP server seems to accept the connection. The mail is just not delivered ! Any idea ?

Here is my debug logs:

14:50:05.160 [INFO ] [runtime.busevents             :22   ] - SendMail received command ON
14:50:05.180 [DEBUG] [m.r.internal.engine.RuleEngine:305  ] - Executing rule 'Test mail'
14:50:05.296 [INFO ] [.openhab.model.script.SendMail:53   ] - Test send mail
>>>>>Sending data EHLO raspberrypi2<<<<<<
>>>>>Sending data MAIL FROM: <myemail1@free.fr><<<<<<
>>>>>Sending data RCPT TO: <myemail2@free.fr><<<<<<
>>>>>Sending data DATA<<<<<<
>>>>>Sending data <<<<<<
>>>>>Sending data .<<<<<<
>>>>>Sending data QUIT<<<<<<
14:50:06.254 [DEBUG] [nhab.action.mail.internal.Mail:156  ] - Sent email to 'myemail2@free.fr' with subject 'test'.

Could you try a recent JAR with

mail:ssl=true

Instead of

mail:tls=true

Mails start to arrive.
The delivery is just very slow.