Can't Send Mail via Thunderbird Client

Can't Send Mail via Thunderbird Client

When I try to send an email to someone via my Mozilla Thunderbird desktop client, it doesn't work. I always get this error message: "Login to server smtp.zoho.com failed".

I know I have the correct password for my account as I can receive email perfectly fine; it's just the sending that's an issue. In addition to that, I also do have the newest version of Mozilla Thunderbird, so that's not an issue.

Thanks.