Opening attachments behind SSL proxy => Bad Request

[quidam]

Hi,

as I don't like to send my mail password unencrypted over the net, I usually access roundcube through my provider's SSL proxy. So, instead of http://webmail..de the URL is https://ssl-account.com/webmail..de. This works fine, except for opening attachments, e.g. in PDF format. In the newly opened tab the iframe only displays a "Bad Request" error (see screenshot).

When I look into the source of the main page, I see the iframe with the source
"./?_task=mail&_action=get&_mbox=INBOX&_uid=6713&_part=2&_preload=1", which expands to
"https://ssl-account.com/webmail..de/./?_task=mail&_action=get&_mbox=INBOX&_uid=6713&_part=2&_preload=1".
This URL is being redirected by roundcube to "https://ssl-account.com/?_task=mail&_action=get&_mbox=INBOX&_uid=6713&_part=2".
You can see that the last URL is missing the main directory "webmail..de".

Any idea, what I can do so that the redirect works correctly?

Regards

Ulrich

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