Hrmbl. #Postfix gurus. How can I add a setting to either main.cf or master.cf that makes sure that SMTP traffic to a specific domain (in this case mailbox.org) ONLY gets sent via IPv4 while all other connections can be IPv4 or IPv6?
(Background: mailbox.org uses the weird CSS blacklist from SpamHaus which has my provider listed because my provider doesn't give a full /64 to me and SpamHaus deems that to be unacceptable)
😷 Jan Wildeboer /
npub1kar…qlv8
2024-04-10 11:16:12
Author Public Key
npub1kar3acrjm496a4v0ptnkakmlr7z6apnzu9pcs76slpjgarv7pqjsf7qlv8Published at
2024-04-10 11:16:12Event JSON
{
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"pubkey": "b7471ee072dd4baed58f0ae76edb7f1f85ae8662e143887b50f8648e8d9e0825",
"created_at": 1712740572,
"kind": 1,
"tags": [
[
"t",
"postfix"
],
[
"proxy",
"https://social.wildeboer.net/users/jwildeboer/statuses/112246166166113976",
"activitypub"
]
],
"content": "Hrmbl. #Postfix gurus. How can I add a setting to either main.cf or master.cf that makes sure that SMTP traffic to a specific domain (in this case mailbox.org) ONLY gets sent via IPv4 while all other connections can be IPv4 or IPv6?\n\n(Background: mailbox.org uses the weird CSS blacklist from SpamHaus which has my provider listed because my provider doesn't give a full /64 to me and SpamHaus deems that to be unacceptable)",
"sig": "0740d2360ee14f87fcbf8e2f45eb8a3adb31fc57d58ead42ef7ea4fa351dfb7fb0f2013471123dd49a1e2b5859fbf56468c1c9b6a7bb182f0de71cd18186badb"
}