I have a complain about your delivery system.
I sent awhile some newsletters, but the process have suddenly disconnected.
My knowledge are settings (emails, forms, etc. ) should be valid.
I run a delivery diagnostic, and I gave an error message:
“FAILED (Could not instantiate mail function.)
– Try to remove the return path on main settings.
Read more. – Try to set on main setting a sender address with the same domain of your blog: brodykonyvtar.hu (you are using email@example.com) ”
Would you help me this problem? I will appreciate that.