XF 1.5 Unable to send mail (User confirmation, 2FA emails, etc)

[JamieSinn]

I'm constantly getting this error log:
https://gist.githubusercontent.com/...4c4752c79e48217c6febae185eefdd4/gistfile1.txt
whenever users try to send mail. Currently the MTA is sendmail, but it also occurs with postfix.

For a bit of background, I've confirmed that sendmail via terminal will send mail properly, but sometimes the domain returns a 451, (related to spam filters).
We've also recently moved servers/ip's to a new VM.

Is there any troubleshooting I can do on the XenForo side to fix it? What can I do to fix it?

Working off a default sendmail config for now so there's a starting point.

 

[Paul B]

Is there any troubleshooting I can do on the XenForo side to fix it?

It's a server error/issue, not XF, so there's nothing you can do from within XF to resolve it.

For reference (point 1): https://xenforo.com/community/resou...ting-guide.5086/updates#resource-update-18729

 

[JamieSinn]

It's a server error/issue, not XF, so there's nothing you can do from within XF to resolve it.

How so? Sendmail is sending mail properly, but XF isn't able to hand it off? L137 according to https://xenforo.com/community/resou...ting-guide.5086/updates#resource-update-18729 says that XF cannot detect an MTA installed, yet there is one?

I've restarted PHP-FPM and Nginx, and I'll see if that fixed it.

 

[JamieSinn]

How so? Sendmail is sending mail properly, but XF isn't able to hand it off? L137 according to https://xenforo.com/community/resou...ting-guide.5086/updates#resource-update-18729 says that XF cannot detect an MTA installed, yet there is one?

I've restarted PHP-FPM and Nginx, and I'll see if that fixed it.

Restarting PHP/Nginx did not fix it, why isn't XF seeing that sendmail is installed?

 

[Paul B]

It's not that XF isn't seeing it installed, that's just one of (typical) the causes of that error message.

There are others - it's something which will have to be investigated on the server, possibly even using debug code in the XF files to determine what.

 

[JamieSinn]

It's not that XF isn't seeing it installed, that's just one of (typical) the causes of that error message.

There are others - it's something which will have to be investigated on the server, possibly even using debug code in the XF files to determine what.

I'll enable debug mode and see what I can find out.