On 7/19/23 05:31, itservice--- via Mailman-users wrote:
How can I configure Mailman3 so that Mails from the list will not be blocked by gmx.net I tried to send with the same user (mailman.cf) at my mail server, which will not be blocked by gmx. unfortunately, I get no bounce back message. They do just not appear in the mail folder of gmx.
Unfortunately, there are some ESPs that will silently discard mail without giving any clue as to the reason. I think this is wrong, but there's nothing we can do about it.
At web.de they go to the SPAM folder.
Is your mail server properly configured with a fixed IP and full circle DNS? Is it on any block lists (check at http://mxtoolbox.com/blacklists.aspx)? Are you DKIM signing your outgoing mail? Are you applying DMARC mitigations to your list mail?
All these things are important.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan