hi i'm using postfix mail , it work and listen on 25 and 587 port ! but when the email client accept the mail server on port 25 but not when i put le port 587
Hi @bensaidRayen,
I don't think this is a problem related to a Let's Encrypt certificate, so this forum isn't the best place to get help with this issue. Could you try a different forum related to Postfix or Thunderbird instead?
Good luck!
do you think that to use port 587 i don't have to get a certificat ??
You need a certificate to use STARTTLS. However, your post doesn't reflect any certificate issue. Also, the error is in French, which isn't a language spoken by many users here on this Community. So I'm not able to understand what Thunderbird is complaining about.
Also, you're connecting to 127.0.1.1
. As answered in your other recent thread, Let's Encrypt can't issue certificates for non-public hostnames or IP addresses.
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