Hachemi Posted August 23, 2023 Share Posted August 23, 2023 Hello, I've setup a custom mail domain on Protonmail, with a smtp token, I tried it on https://dnschecker.org/smtp-test-tool.php and it work good, but on my inivision community i have this message : 535 5.7.8 Error: authentication failed: Invalid authentication mechanism What did I missed ? Link to comment Share on other sites More sharing options...
Randy Calvert Posted August 23, 2023 Share Posted August 23, 2023 It’s saying something you’ve provided is wrong. It could be that you’ve chosen the wrong version of SMTP protocol or the port number is wrong. But this is not an IPB issue. It cannot handle authentication issues. Link to comment Share on other sites More sharing options...
Hachemi Posted August 23, 2023 Author Share Posted August 23, 2023 7 minutes ago, Randy Calvert said: It’s saying something you’ve provided is wrong. It could be that you’ve chosen the wrong version of SMTP protocol or the port number is wrong. But this is not an IPB issue. It cannot handle authentication issues. Thank you for your help but no it's not something I've provided wrong, it said "Invalid authentication mechanism", as I said, my credentials are ok, because I've tried them on https://dnschecker.org/smtp-test-tool.php and the mail was sent and received without any issue. I tried all methods (Plain Text, SSL, TLS) but still same issue. Link to comment Share on other sites More sharing options...
Randy Calvert Posted August 23, 2023 Share Posted August 23, 2023 You can wait for an IPS staffer to confirm, but I can almost assure you this is not a problem in the software. It’s either your server not allowing it to reach the smtp server (firewall issue), or the recipient server is rejecting it. Link to comment Share on other sites More sharing options...
Marc Stridgen Posted August 23, 2023 Share Posted August 23, 2023 As has already been mentioned there, you need to check this with your provider. The message there is coming from your email service Link to comment Share on other sites More sharing options...
Hachemi Posted August 23, 2023 Author Share Posted August 23, 2023 34 minutes ago, Marc Stridgen said: As has already been mentioned there, you need to check this with your provider. The message there is coming from your email service Hum ok, but how do you explain when I try the credentials on https://dnschecker.org/smtp-test-tool.php the mails are sent and received without any issue and not on my Invision forum ? In my opinion it's an easy response to say "check this with your provider ..." without investigate why we have this message. It's not a credential issues, it's an "authentication mechanism" problem. Link to comment Share on other sites More sharing options...
Marc Stridgen Posted August 23, 2023 Share Posted August 23, 2023 19 minutes ago, Hachemi said: Hum ok, but how do you explain when I try the credentials on https://dnschecker.org/smtp-test-tool.php the mails are sent and received without any issue and not on my Invision forum ? This would be a question for your email host also 20 minutes ago, Hachemi said: In my opinion it's an easy response to say "check this with your provider ..." without investigate why we have this message. It's not a credential issues, it's an "authentication mechanism" problem. While I understand the conclusion you seem to have arrived at here, we have many thousands of people using SMTP on a daily basis on our software, and the error message itself is not being thrown by our software. The error is being returned from your email hosting provider. Link to comment Share on other sites More sharing options...
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