While investigating how to reproduce it, I correlated this bug with a mail server malfunction which I observed by receiving a 'Server Unavailable' when using the web-based mail client.
It seems like an unexpected response from the server cause MailWatch plugin to crash. Unfortunatly, I am not able to provide an example of that (since the defunct mail server is now working correctly) but MailWatch crash systematically everytime the mail server was malfunctioning. Now that the mail server is up and running again, MailWatch doesn't disappear from the panel anymore.
While investigating how to reproduce it, I correlated this bug with a mail server malfunction which I observed by receiving a 'Server Unavailable' when using the web-based mail client.
It seems like an unexpected response from the server cause MailWatch plugin to crash. Unfortunatly, I am not able to provide an example of that (since the defunct mail server is now working correctly) but MailWatch crash systematically everytime the mail server was malfunctioning. Now that the mail server is up and running again, MailWatch doesn't disappear from the panel anymore.
The configuration of the problematic mailbox.
[mailbox1]
host=********
username=********
password=********
auth_type=0
server_directory=
use_standard_port=1
nonstandard_port=0
timeout=600
n_newmail_boxes=1
newmail_box_0=INBOX
Sample of /var/log/messages
... [28870] general protection ip:4100ee sp:7ffbadcf7338 error:0 in xfce4-mailwatch -plugin[ 400000+ 1f000]
xfce4-mailwatch
...