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rchalkein said

Unable to send Emails, "Mail Delivered Successfully" message appears but no mails are delivered.

Thunderbird Version is 45.1.0

and what does sending have to do with delivery I must ask? Just like the US postal service, there is no guarantee of delivery in the email specifications, only best efforts.

So can you send to anyone? Is the issue just a single recipient or domain? Is mail sent from your providers web mail delivered?

Thanks Matt for your reply,

I cannot send an email to any email ID, When I am sending Mails are showing in the sent box, but not delivered to any one. Mails sent from the webmail are gettings delivered.

I am able to send emails from Windows Live Mail with the same account configured. Issue is with the Thunderbird mail client, from which I am not able to send any email. Request you to guide for this issue....