Use PC Clienterr

1.

Use PC Client
Receiving mail is ok, normal
Sending mail. The error message
is shown as left

2.

Use PC Client
This is mail which I am trying to
send, but rejected

3.

Use website
This is mail which I am trying to
send, but rejected

4.

Use website
This error windows comes every time when I try to send a mail.

5.

• I am new user of fandex.com
• I registered on 14th Oct. 2019
• I am sure my computer has no virus. Because I changed 3 computers,
but the problem is same.
• Till to now , I have not sent any email successfully.