Help - How to unwind an SRS address?

Chris Drake wrote:

> Please can someone give me a regex or *simple* instructions on how to
> reconstruct the real senders email address from an SRS one (pref
> without installing anything)?

Section 3.2 of http://www.libsrs2.org/srs/srs.pdf says:

>SRS0 addresses have the form: SRS0=opaque-part@domain-part
>where opaque-part may be defined by the SRS0 forwarder, and may only be
>interpreted by this same host.

So it is not possible to reconstruct the original email address.

Roger