Hello Ekincan,
Sorry for the late reply. I've noticed that you no longer have errors sending emails, but the error you got in March 18 was related to a mis-match between your mail server login and the sender address ("Sender address is not valid for your login. Check your email program settings.").
I assume you were able to solve this problem and move forward.
Let me know if you need any further assistance on this topic.
Cheers
Sorry for the late reply. I've noticed that you no longer have errors sending emails, but the error you got in March 18 was related to a mis-match between your mail server login and the sender address ("Sender address is not valid for your login. Check your email program settings.").
I assume you were able to solve this problem and move forward.
Let me know if you need any further assistance on this topic.
Cheers