Wietse Venema <wie...@porcupine.org> wrote: > Michael Grimm: >> On 1. Apr 2021, at 14:45, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote: >>>> On Apr 1, 2021, at 8:40 AM, Michael Grimm <trash...@ellael.org> wrote:
>>>> Is inet_protocols 'order sensitive'? >>> >>> No. > You can specity a preference with: > > http://www.postfix.org/postconf.5.html#smtp_address_preference Great, that's what I was looking for (and didn't find, sorry). > However, if you don't support IPv4 or IPv6, then the way to go is > to remove the unsupported protocol from inet_protools. My mailserver supports IPv4 and IPv6. Background of my question: One of the bigger email providers in Germany (t-online.de = TOL) started to block my IPv4 address. I do assume that this has to do with being blocklisted (see http://www.uceprotect.net/en/rblcheck.php?ipr=135.125.211.209), although my IP address isn't blacklisted but the subnet it is member of. I checked for my IPv6 address, and it isn't blacklisted. Thus I tried to bypass TOL's blocking by using IPv6 until I will have been whitelisted by them (what happened in the meantime). FTR: It wouldn't have worked because TOL's mailservers are IPv4 only. But it is good to know that smtp_address_preference might help me with other ISP blocking my IPv4. Thank you very much and with kind regards, Michael
