On Fri, Nov 11, 2016 at 02:17:01PM +1100, Richard James Salts wrote: > On 11/11/16 11:00, btb wrote: > >On Nov 10, 2016, at 17.17, Noel Jones wrote: > >>On 11/10/2016 4:05 PM, btb wrote: > >>>hi- > >>> > >>>i have an "appliance" which submits mail. it's inflexible, > >>>unfortunately, and uses crappy values for the envelope sender and the > >>>from: header. i have communicated with the vendor in an attempt to > >>>rectify this, but as might be expected, the outcome has been less than > >>>successful. > >>> > >>>hopefully some day, this changes, but in the interim, i'd like to > >>>rewrite the envelope sender and the from: header [ala > >>>sender_canonical_maps] for all mail from this client. > >>> > >>>how should i do this? is the best method to set up an additional > >>>cleanup(8) instance with its own sender_canonical_maps for just this > >>>client? somehow connect the client to its own smtp(8) service to use > >>>smtp_generic_maps? are there other/better methods? > >>> > >>>thanks > >>>-ben > >>> > >>depending on "how" the addresses are broken, you can probably just > >>use canonical_maps to always rewrite the offending address to > >>something valid. There shouldn't be any need for additional cleanup > >>service unless you're fighting some common misspelling. > >> > >>Send specifics of what you're trying to rewrite for further help. > > > >in particular, this client impersonates our users, which we don't > >want. it is aware of users and their email addresses [it's part of a > >voicemail system which sends voicemail messages as email attachments, > >and "helpfully" claims the email message was sent by the caller]. > >for us, this is undesirable. > > > >when a user submits a message with a sender of u...@example.com, we > >of course don't want to change that. however, when this client does > >it, we do. the localpart is dynamic. for example, i would like to > >rewrite a sender of /^.*@example.com$/, but only when the message > >came from this client. many other messages with a sender which > >matches /^.*@example.com$/ are submitted from many other clients, > >but those don't need to be changed. > > You might be able to create an extra service on a different port or > ip address for this appliance that has sender_canonical_maps > defined?
Or find another way to identify the SMTP client that needs the rewrites. Groeten Geert Stappers -- Leven en laten leven
