In this article, I will show you how to send email with vb.net using gmail sever.The SMTP (simple mail transfer protocol) server used for sending email with the help of namespace System.Net.Mail.
I got this following error “The SMTP server requires a secure connection or the client was not authenticated. The server response was:5.5.1 authentication Required” while attempting to send mail using asp.net c# (i.e Google authentication required).
When I tried to run this command “aspnet-regiis.exe -ir” in the command prompt I got the following message “You must have administrative rights on this machine in order to run this tool”.