Am 03.04.20 um 21:03 schrieb Seth Seeger:
Do you use an SMTP relay service? Do you just send directly from your VM’s IP address? Do you have trouble with getting black listed? What have you done about your IP address reputation? Is DKIM and SPF enough to get past an IP address without an established reputation?
Hi Seth,
I am maintaining a mailman3 installation where just few mails are processed per week. It is hosted on its own VM with postfix as SMTP service with DKIM and SPF, so mails are sent from the VM's IP address. I had several issues when starting the mail services with lots of mails getting refused and poor reputation.
But looking at the logs most of the well-known mail hosters give information why they deny mails from your server and what can be done to fix it. It is then "just" work to do and some mails to admins to white list your IP oder reset reputation for your IP. After 5 days all went well.
I propose to test your mail setup with online tools, there are a lot of them around in the net and they are free.
Kind regards Torge