Marek Kozlowski:
> :-)
>
> Some users forward their incoming mail to some external mail servers.
> Unfortunately AFAIK with no action taken it may result in breaking the
> SPF. The solution for this problem I know is rewriting addresses with
> SRS (postsrsd). Unfortunately postsrsd uses the same settings as
> canonicals do which in my case is inadvisable because I want canonicals
> to operate independently of SRS. A few days ago I sent a post regarding
> this problem.
What is the problem? Perhaps you are unaware that Postfix canonical
mapping is recursive, and that it can apply multiple mappings.
Wietse