Re: re-route mails on demand during block of ip address

2020-03-10 Thread Viktor Dukhovni
On Tue, Mar 10, 2020 at 05:18:01PM -0500, Noel Jones wrote: > On 3/10/2020 4:55 PM, Stefan Bauer wrote: > > > > i know this is quite old, but > > smtp_fallback_relay should only get triggered on > > undeliverable-events and not when remote replies with a 4xx or 5xx - > > right? Not quite.

Re: re-route mails on demand during block of ip address

2020-03-10 Thread Noel Jones
On 3/10/2020 4:55 PM, Stefan Bauer wrote: Hi Noel, i know this is quite old, but smtp_fallback_relay should only get triggered on undeliverable-events and not when remote replies with a 4xx or 5xx - right? That's what the docs say, which implies my off-the-cuff crappy workaround is

Re: re-route mails on demand during block of ip address

2019-05-31 Thread @lbutlr
On 31 May 2019, at 11:12, Stefan Bauer wrote: > thank you for your reply. You know, in real world, ips/ranges get blocked > from time to time Not be legitimate RBLs they don't unless you are actually sending spam. If more IPs than just you mail server are getting blocked, then you probably

Re: re-route mails on demand during block of ip address

2019-05-31 Thread Blake Hudson
The majority of blacklists work on the individual host level (IPv4 /32 or IPv6 /64). If your provider's entire /22 is being listed by public blacklists then I suspect you either have a very disreputable provider or the provider has indicated that the /22 is intended for use by

Re: re-route mails on demand during block of ip address

2019-05-31 Thread Stefan Bauer
Hi Noel, thank you for your reply. You know, in real world, ips/ranges get blocked from time to time and i would like to be ready for this and not rely on others :) The workaround looks indeed crappy - i wonder how others handle this situation in "bigger" setups? I'm currently having 7000-8000

Re: re-route mails on demand during block of ip address

2019-05-31 Thread Noel Jones
On 5/31/2019 1:48 AM, Stefan Bauer wrote: Hi, I'm running a pair of postfix-servers in different data-centers (different ip networks) for outgoing-only delivery. once in a while my providers /22 appear on public blacklists, so mails from my nodes also gets rejected. For this, i have now a