[pfx] Re: Behaviour in case of multiple relay hosts with multiple DNS records

2024-01-08 Thread Peter Wienemann via Postfix-users
Dear Viktor, dear Wietse, thanks again for your vigilant eyes. On 2024-01-05 19:31:35 +0100, Viktor Dukhovni via Postfix-users wrote: On Fri, Jan 05, 2024 at 06:46:01PM +0100, Peter Wienemann via Postfix-users wrote: RFC 2033 says: "The LMTP protocol is identical to the SMTP protocol

[pfx] Re: Behaviour in case of multiple relay hosts with multiple DNS records

2024-01-05 Thread Peter Wienemann via Postfix-users
Dear Wietse, thanks for your careful review. On 2024-01-05 16:11:56 +0100, Wietse Venema via Postfix-users wrote: Peter Wienemann via Postfix-users: smtp(8): The Postfix SMTP+LMTP client supports multiple destinations

[pfx] Re: Behaviour in case of multiple relay hosts with multiple DNS records

2024-01-05 Thread Peter Wienemann via Postfix-users
Hi Viktor, On 2024-01-02 18:13:22 +0100, Viktor Dukhovni via Postfix-users wrote: That said, indeed the documentation is not explicit on this point, one has to read "between the lines". If your technical writing skills are adequate, perhaps you could suggest some concise and clear text

[pfx] Re: Behaviour in case of multiple relay hosts with multiple DNS records

2024-01-02 Thread Peter Wienemann via Postfix-users
Hi Viktor, On 2023-12-29 19:59:42 +0100, Viktor Dukhovni via Postfix-users wrote: RFCs 5321, 2821 and 821 have been around long enough to expect compliance with core elements of the SMTP specification from any mainstream MTA, and particularly Postfix, which appears to be the most widely

[pfx] Re: Behaviour in case of multiple relay hosts with multiple DNS records

2023-12-29 Thread Peter Wienemann via Postfix-users
Hi Wietse, On 2023-12-29 18:36:59 +0100, Wietse Venema via Postfix-users wrote: Peter Wienemann via Postfix-users: On 2023-12-15 22:17:08 +0100, Wietse Venema via Postfix-users wrote: There is no such thing as falling back to A or records after trying MX records. The two are mutually

[pfx] Re: Behaviour in case of multiple relay hosts with multiple DNS records

2023-12-29 Thread Peter Wienemann via Postfix-users
Dear Wietse, On 2023-12-15 22:17:08 +0100, Wietse Venema via Postfix-users wrote: Peter Wienemann via Postfix-users: Thanks Wietse! Your pseudo-code clarifies the approach chosen by Postfix. What still remains unclear to me is the order in which destinations are tried. Let us again consider

[pfx] Re: Behaviour in case of multiple relay hosts with multiple DNS records

2023-12-15 Thread Peter Wienemann via Postfix-users
On 2023-12-12 15:51:58 +0100, Wietse Venema via Postfix-users wrote: Peter Wienemann via Postfix-users: Dear Postfix experts, checking the documentation for the relayhost parameter [0] I find no indication how Postfix behaves in case of multiple relay hosts with multiple DNS entries. Let us

[pfx] Behaviour in case of multiple relay hosts with multiple DNS records

2023-12-12 Thread Peter Wienemann via Postfix-users
Dear Postfix experts, checking the documentation for the relayhost parameter [0] I find no indication how Postfix behaves in case of multiple relay hosts with multiple DNS entries. Let us assume the following setting: relayhost = mail1.example.com, mail2.example.com In addition let us