502 on new topic/reply submission

Hi Websmyth,

You can get around this problem by selecting the ‘Send emails in the background…’ options for both topics and replies. You’ll find it under Settings > Forums > Email Notifications.

Let me know if that doesn’t fix the issue.

Cheers,
Vinny

Hi Vinny,

Thanks for such a quick response. That seems to have avoided the error – hopefully everyone will receive their emails now, too!

Dave

Apologies for resurrecting this thread, but an update on this…

Checking the ‘Sending emails in the background…’ option seemed to resolve our 502 issue but unfortunately that doesn’t seem to have resolved our main issue of some users not receiving notifications.

So our current situation is that around 95% of users receive their notifications, but a couple of users (always the same ones) never do. Using the WP Mail Log plugin, we can see that the emails aren’t being sent/scheduled to these users so it’s not a spam or Mailgun issue.

The users in question have the same role as the other users that are successfully receiving their emails…very odd. Any ideas as to what could be causing this?

Thanks again,

Dave

Hi Dave,

Sorry for the delay. I totally missed this. I’d recommend adding some debugging to the part where wp_mail() is called, making it save the current address as well as the full list. That way you can compare them and certify that the loop is completing.

Put this code in your functions.php and look for the mailout.log file in the same directory. Remove it once you’re satisfied with the results.

function my_show_all_recipients( $recipients )
{
	$list = array();
	foreach ($recipients as $recipient)
	{
		$list[$recipient->ID] = $recipient->user_email;
	}
	
	$out = array( 'num_recipients' => count($recipients), 'recipients' => $list );
	
	error_log( 'Full recipient list is: ' . print_r($out,1), 3, dirname(__FILE__) . '/mailout.log');
	
	return $recipients;
}
add_filter( 'bbpnns_filter_recipients_before_send', 'my_show_all_recipients', PHP_INT_MAX, 1 );

function my_debug_mailout_loop( $user_info, $filtered_subject, $filtered_body, $recipient_headers )
{
	error_log( 'Sending message to: ' . print_r($user_info->user_email,1), 3, dirname(__FILE__) . '/mailout.log');
}
add_action( 'bbpnns_before_wp_mail', 'my_debug_mailout_loop', 10, 4 );

Hi Vinny,

Thanks for this. I added that code to functions.php and ran a test post. The result in the log file contained 14 copies of:

Full recipient list is: Array
(
    [num_recipients] => 0
    [recipients] => Array
        (
        )

)

I’m guessing that’s not right?

Indeed it isn’t. Try changing PHP_INT_MAX for -10. I want to know if something is removing the recipients.

Hmmm, it seems to be producing the same response…

Hi Vinny,

Just following up in case this went missing! I left this running and we’re still seeing the same results in the log file… Any ideas?

Thanks,

Dave

Hi Dave,

I did miss your previous message! Sorry about that!

The debugging shows that the recipient list is empty. The way it is, nobody gets sent any messages, which doesn’t make sense as you say only a couple of people aren’t getting them.

Please create an admin account for me using email vinny [at] usestrict [dot] net on a staging server, so I can have a look.

Cheers,
Vinny

Hi Vinny,

That’s great, thanks! I’ve set up an account from our staging server, so you should have received an email about that now. ??

Let me know if that doesn’t come through.

Thanks again,

Dave

Nothing yet. Not in the spam folders, either.

Hi Vinny,

Thanks for letting me know. I’ve just emailed you directly…

Dave

For the record, Dave and I worked on this and it looks like his host is killing the process as he’s got a LOT of users to notify. To make matters worse, the host doesn’t offer pcntl_fork.

I’m studying the possibility of creating a batch mailer premium add-on to work with Mailgun and Sendgrid, for starters. I don’t want to bloat bbpnns with code that not everyone will need/use.

I’ll update the thread once I have something more concrete.

Vinny’s gone above and beyond what I’d expect from a plugin author – thanks so much!

Thanks for the kind words!