> Am 29.03.2016 um 12:05 schrieb Boudewijn Dijkstra > <[email protected]>: > > Hi, > > It was a bit of a struggle, but I managed to set up a simple build > environment in OpenBSD 5.9 for creating OpenSMTPD filters. I currently have > a filter in beta quality that performs an SPF check using libspf2 and inserts > a "Received-SPF:" header into the message. Would the OpenSMTPD developers be > interested in integrating such a program into the Extras package?
Absolutely, yes. Send a diff or better a pull request, please :) Make sure you follow coding style of existing filters. > I am planning to build upon this to create a spammer-filter that resembles > OpenBSD's spamd (in greylisting mode), but based on domain names (and also > sender glob patterns). This sounds as you want to do to many things in a single filter. You can easily chain filters, so try to do single simple tasks in a filter. Keep it simple for a start and have a look into the existing ones, e.g. filter-regex > Alas the filter API doesn't provide a direct way to 'stutter' an entire > conversation, though of course it is possible to pause on every callback > event. What do you think of the idea of a stutter mode in OpenSMTPD? I use it already, see filter-pause. You may want to extend it, instead of re-inventing the wheel. As mentioned above, you can chain things. Make sure you follow timeouts recommended in RFCs for stuttering. > This spammer-filter needs an interface to a database where greylisting status > is kept and where policies are kept. For a filter program, what would you > recommend for persistent storage? This again sounds a bit over-engineered. Start simple, and add DB later. Do you really want to re-implement spamd, why? There are already tables in extras which use various DBs for lookups, have a look there for ideas. > -- > (Remove the obvious prefix to reply privately.) > Gemaakt met Opera's e-mailprogramma: http://www.opera.com/mail/ > > -- > You received this mail because you are subscribed to [email protected] > To unsubscribe, send a mail to: [email protected] > -- You received this mail because you are subscribed to [email protected] To unsubscribe, send a mail to: [email protected]
