Re: recommended smtp proxy script?
On 13/10/17 10:40, Matus UHLAR - fantomas wrote: the only important part is - you apparently should not use milter on submission ports. Am 13.10.2017 um 20:42 schrieb Daniele Nicolodi: Why? On 13/10/17 15:30, Robert Schetterer wrote: some milters are fine to use with submission others not, i.e clamav-milter should work, spamass-milter on the other hand may slow down sending mail, which might lead to anger for users, it needs time to find out spamness of an email by doing i.e outside network operations with razor etc. So it simply depends on what you trying to goal .,rethink of your whole mail design , look at your logs then choose the tool or tec which design fits best for desired task Yes, I should have explained it. Simply said - anything that takes much time should apparently not be used on submission ports, or you may expect your users to complain about long mail sending delays. OTOH, it's more effective when you want to reject mail at SMTP time, because in that case you don't have to generate bounces. Just be careful that the processing is done within 10 minutes, which is the timeout for DATA trermination phase, otherwse you can encounter data duplication or message retransmission. It may be better to have this under 5 minutes. On 13.10.17 16:09, Daniele Nicolodi wrote: This is a much less categorical statement. The possible issues you point out are not specific to milters, but apply to all mail filtering techniques. this applies to smtp proxy and milters, but it doesn't apply to content filter, since that one applies after mail has been received. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Nothing is fool-proof to a talented fool.
Re: recommended smtp proxy script?
Den 13. okt. 2017 18:40, skrev Matus UHLAR - fantomas: > On 13.10.17 12:25, Håkon Alstadheim wrote: >> I'm thinking about hacking on a before queue proxy filter, but the link > > the only important part is - you apparently should not use milter on > submission ports. Forgot answering this point. My filter WOULD be on the smtpd listening on port 25. Going with a mimedefang hack for now anyway. Progressing slowly, setting up mimedefang in a bare-bones fashion first.
Re: recommended smtp proxy script?
Den 13. okt. 2017 18:40, skrev Matus UHLAR - fantomas: > On 13.10.17 12:25, Håkon Alstadheim wrote: >> I'm thinking about hacking on a before queue proxy filter, but the link >> to suggested perl framework at >> http://www.postfix.org/SMTPD_PROXY_README.html seems dead. I googled >> "Bennett Todd smtp proxy", which brings mee to a git repo last updated >> five years ago. > > what exactly do you need smtp proxy for?> > you can use milter with about the same effect milters can do > (and the milter protocol supports some features not found in proxy) > I'm contemplating some unsavoury rewriting of incoming mail to make bloated mails better suited for my personal devices. milter looks like an easier fit, yes. Looking into hacking mimedefang for my needs. Seems it is intended for this kind of hacking, but starting from almost-scratch with a bare-bones smtp proxy would be cleaner, and maybe more educational for me. Process of implementing might even educate me to the point where I realize I should not be doing this :-) More features is not what I'm looking for. Quite happy with some rbls and rspamd milter. > there are some milters around - spamass-*, clamav-* , amavisd-* > > the only important part is - you apparently should not use milter on > submission ports. > >> What is the current best starting point for hacking a proxy filter? >> >> I'm running debian stretch on the mail-server, but I believe that would >> be irrelevant in this case, as pulling a pre-packaged .deb would only >> create extra clutter. >
Re: recommended smtp proxy script?
On 13/10/17 15:30, Robert Schetterer wrote: > Am 13.10.2017 um 20:42 schrieb Daniele Nicolodi: >> On 13/10/17 10:40, Matus UHLAR - fantomas wrote: >>> the only important part is - you apparently should not use milter on >>> submission ports. >> >> Why? >> > > some milters are fine to use with submission > others not, i.e clamav-milter should work, spamass-milter > on the other hand may slow down sending mail, which might lead to anger > for users, it needs time to find out spamness of an email by doing i.e > outside network operations with razor etc. > So it simply depends on what you trying to goal .,rethink of your > whole mail design , look at your logs then choose the tool or tec which > design fits best for desired task This is a much less categorical statement. The possible issues you point out are not specific to milters, but apply to all mail filtering techniques. Cheers, Dan
Re: recommended smtp proxy script?
Am 13.10.2017 um 20:42 schrieb Daniele Nicolodi: > On 13/10/17 10:40, Matus UHLAR - fantomas wrote: >> the only important part is - you apparently should not use milter on >> submission ports. > > Why? > > Cheers, > Dan > some milters are fine to use with submission others not, i.e clamav-milter should work, spamass-milter on the other hand may slow down sending mail, which might lead to anger for users, it needs time to find out spamness of an email by doing i.e outside network operations with razor etc. So it simply depends on what you trying to goal .,rethink of your whole mail design , look at your logs then choose the tool or tec which design fits best for desired task Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Schleißheimer Straße 26/MG, 80333 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
Re: recommended smtp proxy script?
On 13/10/17 10:40, Matus UHLAR - fantomas wrote: > the only important part is - you apparently should not use milter on > submission ports. Why? Cheers, Dan
Re: recommended smtp proxy script?
On 13.10.17 12:25, Håkon Alstadheim wrote: I'm thinking about hacking on a before queue proxy filter, but the link to suggested perl framework at http://www.postfix.org/SMTPD_PROXY_README.html seems dead. I googled "Bennett Todd smtp proxy", which brings mee to a git repo last updated five years ago. what exactly do you need smtp proxy for? you can use milter with about the same effect milters can do (and the milter protocol supports some features not found in proxy) there are some milters around - spamass-*, clamav-* , amavisd-* the only important part is - you apparently should not use milter on submission ports. What is the current best starting point for hacking a proxy filter? I'm running debian stretch on the mail-server, but I believe that would be irrelevant in this case, as pulling a pre-packaged .deb would only create extra clutter. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Despite the cost of living, have you noticed how popular it remains?
