Re: How To Rewrite "Mail From:"?
On Mon, Jul 06, 2020 at 07:40:27PM +, Drew Tomlinson wrote: I use postfix for my own domain and have been forwarding my email to outlook.com for years. Recently, email has just been disappearing between my server and my inbox so I set it to forward my email to gmail.com. Shortly after, I saw some messages like these in the logs: You're running into intentional breakage caused by SPF and DMARC. Sadly, this means that (simple) mail forwarding no longer works reliably. In reading Google documentation, I learned SPF is failing. Further reading revealed this is a common problem with forwarded email since it is not being sent by an authorized IP address. Other articles suggested the workaround for this is to change the "Mail From:" to reflect my domain since I have SPF configured for it. And maybe this is what is meant by SRS (Sender Rewriting Scheme)? On 06.07.20 15:53, Viktor Dukhovni wrote: Even changing the envelope sender is not enough. With DMARC you need to also change the "From:" header in the message. only if content changes, OR a DMARC mail passes SPF but not DKIM, (iirc) This should make it a bit easier to be DMARC compliand by implementing SRS (forwarding that keeps SPF working). Domains that configure DMARC but not DKIM (are there such?) are of course in trouble when their mail is forwarded this way. The simplest thing to do is to encapsulate the original message as attachment to a new message. yes, this should work too. -- 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. He who laughs last thinks slowest.
Re: rewrite all but one address
Paul Littlefield: > Hello, > > How would I rewrite all emails from one domain to another domain, > apart from a single address, so that the messages are sent on to > an external mail relay by default? > > e.g. > > @test.com > @example.com > smtp:relay > joe.blo...@test.com > delivered locally Rewrite the address to itself (this is how recursion stops). > Is this canonical (http://www.postfix.org/canonical.5.html) ? (I'd use virtual_alias_maps, because canonical maps can change message headers which may not be needed). Wietse
rewrite all but one address
Hello, How would I rewrite all emails from one domain to another domain, apart from a single address, so that the messages are sent on to an external mail relay by default? e.g. @test.com > @example.com > smtp:relay joe.blo...@test.com > delivered locally Is this canonical (http://www.postfix.org/canonical.5.html) ? Thanks, Paul
Re: content_filter with external script and virtual_alias_maps
On Fri, Jul 3, 2020 at 3:44 AM Matus UHLAR - fantomas wrote: > > >> Stats Student: > >> > 1) in addition to sending the messages to a script, is there a way to > >> > store the messages in a real mailstore ( Maildir ) ? > > >On Wed, Jul 1, 2020 at 8:31 AM Wietse Venema wrote: > >> Add a recipient with virtual_alias_maps, sender_bcc_maps, > >> recipient_bcc_maps, etc., and use the existing local(8) or virtual(8) > >> delivery agent to deliver to a maildir. > > On 01.07.20 13:34, Stats Student wrote: > >As for your other suggestion, I am sorry I didn't follow what you > >recommended specifically. > > you can alias the recipient to two destinations, where one sends mail to > script, other delivers it to mail store. > > you can do this in virtual alias table, alias table, in .forward file etc. > > Note that with alias table or .forward, failure to deliver to the script can > result in multiple delivery. > > -- > 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. > Enter any 12-digit prime number to continue. Thank you, but I still do not understand why I need to provide additional user aliases. If my system receives a message for us...@example.com, that message needs to go to two places - 1) the script and 2) Maildir mailstore. I don't want that message to now get addressed to user2@, user3@, etc, the same way that one can have messages addressed to root be aliased to real users - root: user1, user2, etc. Maybe I am not understanding aliases correctly. If anything, I would think the solution would be to add another virtual_transport, or maybe even a transport_map (which I did look into but couldn't see how to make it work for my problem). Maybe my use case is very unusual and I should just enhance my script to save messages in separate files (they'll be used to enhance the parser, not be read by users), but I am hoping I can avoid that.
Re: content_filter with external script and virtual_alias_maps
Stats Student: > Thank you, but I still do not understand why I need to provide > additional user aliases. If my system receives a message for To deliver a message to two destinations 1) a script 2) a maildir file That message needs to have (surprise!) two destinations. 1) a destination that delivers to the script 2) a destination that delivers to the maildir file You can add that second destination with virtual_alias_maps, sender_bcc_maps, recipient_bcc_maps, .forward files, and so on. Wietse
Re: content_filter with external script and virtual_alias_maps
On Tue, Jul 7, 2020 at 2:15 PM Wietse Venema wrote: > > Stats Student: > > Thank you, but I still do not understand why I need to provide > > additional user aliases. If my system receives a message for > > To deliver a message to two destinations > > 1) a script > 2) a maildir file > > That message needs to have (surprise!) two destinations. > > 1) a destination that delivers to the script > 2) a destination that delivers to the maildir file > > You can add that second destination with virtual_alias_maps, > sender_bcc_maps, recipient_bcc_maps, .forward files, and so on. > > Wietse > Could you please show an example of what would go into one of those maps to indicate a maildir destination? us...@example.com
Re: content_filter with external script and virtual_alias_maps
Stats Student: > On Tue, Jul 7, 2020 at 2:15 PM Wietse Venema wrote: > > > > Stats Student: > > > Thank you, but I still do not understand why I need to provide > > > additional user aliases. If my system receives a message for > > > > To deliver a message to two destinations > > > > 1) a script > > 2) a maildir file > > > > That message needs to have (surprise!) two destinations. > > > > 1) a destination that delivers to the script > > 2) a destination that delivers to the maildir file > > > > You can add that second destination with virtual_alias_maps, > > sender_bcc_maps, recipient_bcc_maps, .forward files, and so on. > > > > Wietse > > > Could you please show an example of what would go into one of those > maps to indicate a maildir destination? Prerequisites: foo@example delivers to script bar@example delivers to maildir Use virtual_alias_maps with: foo@example foo@example, bar@example Now, mail for foo@example goes to script and maildir. How to deliver to script or maildir? Use transport_maps to select a delivery agent that delivers to script (local or pipe delivery agent) or maildir (virtual or local delivery agent). foo@example
Re: content_filter with external script and virtual_alias_maps
On Tue, Jul 7, 2020 at 4:19 PM Wietse Venema wrote: > > Stats Student: > > On Tue, Jul 7, 2020 at 2:15 PM Wietse Venema wrote: > > > > > > Stats Student: > > > > Thank you, but I still do not understand why I need to provide > > > > additional user aliases. If my system receives a message for > > > > > > To deliver a message to two destinations > > > > > > 1) a script > > > 2) a maildir file > > > > > > That message needs to have (surprise!) two destinations. > > > > > > 1) a destination that delivers to the script > > > 2) a destination that delivers to the maildir file > > > > > > You can add that second destination with virtual_alias_maps, > > > sender_bcc_maps, recipient_bcc_maps, .forward files, and so on. > > > > > > Wietse > > > > > Could you please show an example of what would go into one of those > > maps to indicate a maildir destination? > > Prerequisites: > foo@example delivers to script > bar@example delivers to maildir > > Use virtual_alias_maps with: > foo@example foo@example, bar@example > > Now, mail for foo@example goes to script and maildir. > > How to deliver to script or maildir? Use transport_maps to select > a delivery agent that delivers to script (local or pipe delivery > agent) or maildir (virtual or local delivery agent). > > foo@example Sorry if I am not explaining the requirement correctly. I need the same message addressed to f...@example.com to be delivered to *two* places - the script AND the mailstore, *not* two different accounts. I do *not* want messages addressed to f...@example.com to also go to b...@example.com which is what the virtual_alias_maps you showed would do. Re: transport maps -- my understanding is that those work on a per domain basis. Don't think I want to have a separate transport for each user.
