Unable to Send from Optimum Email

[katemith222]

From the last few days, I am not able to send emails through my Optimum emails. I think there is a problem in my SMTP settings. Please tell me the correct SMTP settings for Optimum email.

[russelcrowe]

If you cannot send email through Optimum Online (Optonline) or another Internet Service Providers (ISPs) and you are receiving an error message which states something such as “Cannot send outgoing mail due to Port 25 being blocked”, this usually indicates a problem with your Internet Service Provider (ISP) and NOT your ...

[evanshris]

If you can receive emails but can not send emails this usually means the authenication required by the outgoing (SMTP) server is not configured. ... 'My outgoing (SMTP) server requires authentication' is not checked. In Outlook it is in advanced settings.