On 2016-03-02, Claus Niesen <cnie...@gmx.net> wrote: > I used to run my own at home mailserver (openbsd + qmail) . Since I no > longer have a static IP, I switched to an email provider that supports > minus addressing but operates in the dark ages, especially in regards to > security updates. Needless to say I need a better host. I'd rather not > host my own mailserver but so far haven't been able to find an > alternative.
Unless someone comes up with a recommendation I think you'll need to one way or another, either a real machine or a cheap vps (vm based colo). You could just use this to redirect to another single email address or "convert" - to +, but you may run into problems with spam filtering especially if you're feeding it to a large provider, or you could run the mail storage yourself (imap/etc). Besides qmail, this is easy to setup with Postfix (my preferred option for these) and Exim, it should also be possible with sendmail but you may have to grovel around in the cf parts, I think the m4 files only deal with +. For OpenSMTPD I haven't tried it but I suspect you may be able to do this with a virtual map using a python script via table-python (in ooensmtpd-extras in ports) but there isn't much documentation for this. Though actually a quick search for "opensmtpd table-python" throws up https://gist.github.com/unconfigured/e72a18f3dd12f7c4fc5c which looks pretty much like what you need there.
