wordpress not sending emails via contact forms

my website is not sending emails using the contact form 7, I have installed several smtp plugins, used ssl, tsl settings, changed the email routing to remote mail exchanger but all are not working

whenever i try to send message from the contact form i still get this message "THERE WAS AN ERROR TRYING TO SEND YOUR MESSAGE. PLEASE TRY AGAIN LATER."

I have mailed zoho with the error displaying when trying to do a test and i was given a procedure to follow and then revert. Find below

Hi,

      We apologize for the delay in our response.

      Kindly do the following in your server.

In order to check Zoho SMTP connectivity, kindly follow the below steps to collect trace route & Open SSL status for SMTP,

For Windows,

1. Click here and download the appropriate Open SSL client (x86 which is 32 bit or x64 based on your operating system).

2. Unzip the downloaded file and go to openssl-0.9.8k_X64-> bin-> openssl.exe.

3. Enter "s_client -connect smtp.zoho.com:465".

4. Enter "ehlo Zoho.com".

5. Enter "Auth login".

6. Enter the result (open this website in a new tab, enter your email address, select encode and copy the result).

7. Enter the result (open this website in a new tab, enter your password, select encode and copy the result).

8. Right click on the top bar next to minimize, maximum buttons and select edit -> Select all (to select the text).

9. Again right click on the top bar next to minimize button and select edit -> Copy (to copy the text).

10. Open notepad, paste the copied content, save the text file and send it to us. Also, take screenshot of the complete window and send these details to us.

This i have done and sent the necessarily screenshot and text documemnts to zoho but ever since then, Zoho has not replied me yet and the clients are on my neck.

I would gladly appreciate if zohomail will revert as soon as possible. Thanks in anticipation for your quick reply