You got this on a clean Core-install too (no 3rd Party-Plugins, default-Template, …)?

It's not an error, the logger is just hardcoded to the error level with the "Error in Mail API" message prefix because the logging callback was originally set up only logging errors and wasn't updated to reflect it can also handle debug messages.

TL;DR, it's coming from this line and at that point the data variable is empty. Not an error.

If that line in your log file is your only "issue", this can be closed. Otherwise, more detail is needed to work out whatever problem it is you're having.

You got this on a clean Core-install too (no 3rd Party-Plugins, default-Template, …)?
Doesn't work on clean install too.

It's not an error, the logger is just hardcoded to the error level with the "Error in Mail API" message prefix because the logging callback was originally set up only logging errors and wasn't updated to reflect it can also handle debug messages.

TL;DR, it's coming from this line and at that point the data variable is empty. Not an error.

If that line in your log file is your only "issue", this can be closed. Otherwise, more detail is needed to work out whatever problem it is you're having.

I followed this guide https://docs.joomla.org/How_do_I_use_Gmail_as_my_mail_server%3F and did all neccessary requirements like app password with no spaces, using the gsuite username emailadres.

587, starttls, smtp.gmail.com etc.

The only concern I see but I dont know technically if that is the case, is that I authenticate with a username over smtp on a different domainname. Now I spoke to google a few times in the last days and checked every setting including whitelisting etc, for that domain for the gsuite main domainname. I also tried all other combinations like port 25 and 465 over ssl. I added letsencrypt on vmware linux and inside joomla ssl is on and running no errors. php opensll is on. the domain is active as well inside the admin domain enviroment. spf is ok as well.

Still not following what your issue is. There is a reason there is an issue template with some basic questions. Right now all I am getting out of this issue and the forum thread is "I have a line in the log file that says something was an error". You have not explained what is misbehaving or what the desired end result you are looking for is, or even what it is you're trying to do outside of set up email to be sent with some Google account (which is inferred based on the config snippet and link you've given).

Hi, Sorry, I am not a programmer and I have a hard time telling the right things and skipp the unimportant stuff due to knowledge gap.

I'll try to record a video these days with every required step that is advised to setup outgoing email for gsuite business. If any of you can are capable of just logging in into a gsuite business account, create the app password and setup two step and use the required settings for gmail in the joomla settings, and it works, I would not know why it is that mine is not working even though I added every requirement. php opensll is enabled, ssl letsencrypt is valid, spf is correct, all of that is just like everyone tells me it should be but whatever I do, it just does not authenticate. I asked my provider to run through the steps in this doc. If that does not help, I quit :) https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

Note port 587 is blocked on a lot of hosts for outgoing connections, also make sure RSForms from mail is set to use global mail address.

To use Joomla! And Gmail suits or normal you also need to enable less secure apps within that google account if I remember correctly.

Note port 587 is blocked on a lot of hosts for outgoing connections, also make sure RSForms from mail is set to use global mail address.

To use Joomla! And Gmail suits or normal you also need to enable less secure apps within that google account if I remember correctly.

Hi Tony :), I am going to ask my host about port 587. They probably are aware of that since they were checking why it didn't work too.
Enable less secure apps is something that seems to can't be set when using two step autentication. Therefor they advise to use an app password (we need to use that password inside joomla's global mail config password field). I use {global:mailfrom}. However, to test if the connection is working, I use the global configuration > server "send testmail" button (so this shouldn't matter).

I shouldn't add a relay service in gsuite right? I mean, my server doesn't relay to any other IP other then google's IP? OR does dns IP have to be added in spf as well?

I found the sollution. IT seems it is my firewall, when I disable it, it works. Now I will try to see why since port 587 and 465 are both enabled. Maybe only 587 should be on?

Anyway, thanks and sorry for making it a bug report while it is my own lack of knowledge.

Set to "closed" on behalf of @alikon by The JTracker Application at issues.joomla.org/joomla-cms/25703

happy you solved, maybe helpfull for others too