Not able to send email

Hi for the longest time I have used my gmail to receive my email from Zoho, then I use my Gmail to respond without a problem. A few weeks ago that stopped working and now again. I cannot send out of gmail account although the settings all seem to be correct. I continue to get this error when I try to send mail:

from:Mail Delivery Subsystem <mailer-daemon@googlemail.com>to:traveldbo@gmail.com
date:Mar 10, 2022, 11:14 AMsubject:Delivery Status Notification (Failure)mailed-by:mail-sor-f69.google.comsigned-by:googlemail.comsecurity:

Standard encryption (TLS) Learn more

:Important mainly because you often read messages with this label.

I delete the "Send as mail" in gmail and tried to reenter and now I get this:

I changed the port number to 465 from 587 because I received the same error and nothing.

I enter the right password (verified because I went back to Zoho to sign in) and nothing

Send mail through your SMTP server

Configure your mail to be sent through destinationsbyolga.com SMTP servers Learn more

SMTP Server:	Port:
Username:
Password:
	Secured connection using SSL (recommended) Secured connection using TLS
	Couldn't reach server. Please double-check the server and port number.