Absolutely you can, this is one of the must-have features in SMTP extension especially. We have written this carefully in our user guide. Besides, you can figure out How to configure Gmail SMTP in Magento 2 by this tutorial.
Multiple languages is one of default feature in Magento 2 and so does our extensions include it. Languages package and a very detailed tutorial has been written here How to translate Mageplaza extensions to other languages. Languages can be translated both in backend and frontend.
This can be accessed by the following Mageplaza > SMTP > Email Logs. From here you can look back all the sent email from the server to customers. This log email can be cleaning periodically.
Make your way to Magento backend Store > Configuration > General > Email address > General Email.
Sometimes you got this message when test with Mageplaza SMTP.
Error message: Connection timed out
I suggest you check again your mail server first.
Please notice that our SMTP module is just a tool, your mail server should be able to work itself first.
To test its functions. Please follow this instruction https://technet.microsoft.com/en-us/library/aa995718%28v=exchg.65%29.aspx
Then you can ask your host provider about this, they will help you troubleshoot SMTP issues.
If you are using google, you need to do some extra settings, please follow this link https://support.google.com/accounts/answer/6010255?hl=en
If you did all the things or the host provider confirms everything is working, please let us know, we will check the issue for you.