On 05/10/2011 08:37 PM, Timo Sirainen wrote: > On 10.5.2011, at 21.32, Andrzej Adam Filip wrote: > >> Do you intent any time soon to provide some hook to alow MTA reject >> in reply to "RCPT TO:" (in SMTP session) messages to over quota >> mailboxes? > > Can you give specifics of what I'd need to do for that? > I remember there is some sendmail protocol that is also supported by > Postfix (I think), but I can't remember specifics (and a bit lazy to > google for it). > v2.0 would finally allow easily implementing such > service. Hmm. I guess such service would both have to check if the > user exists and also the quota value, and give errors about both of them.
Both sendmail and postfix support milter protocol/API. Unlike API provided by library the protocol is "not officially" documented. Sendmail/sendmail.cf could also use trivial "socket map" protocol (query->response) [sample Perl scripts implementing it are in contrib directory of sendmail distribution]. IMHO the best honeypot for developers (especially without dovecot expertise) would be simple library providing two functions email_address -> state( does_not_exist, under_quota, over_quota) email_address, message_size -> ( does_not_exist, ....).
