SMTP server requires a secure connection or the client was not authenticated | Email Sending ASP.NET

"SMTP server requires a secure connection or the client was not authenticated"
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[sketchturner]

I've spent almost two days trying to make this work. THANK YOU SO MUCH!

[RamKumar-ylbd]

i was tried a lot i spent two days in searching about this problem but only your's vedio helps me thanku u so much sir

[itsolution]

Work like charm man, Thank you very much

[geektactics]

Thanks for solviing my problem. No solutions on the Internet except yours.

[kooshasamadi]

Your amazing pal i had this issue for a week i did whatever i can to solve but I couldn't thank you so much

[almerindoeuclidespacule]

Obrigado. Simples e pratico. Facil de aplicar.

[reddyyuki]

Thank you so much bro, I have been trying to solve this error for around 2 days, I can't believer that sth that simple could fix the erro, thank you again

[ajaykumarkushwaha]

That is my error and not solve this error, and I try it with same process. "The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required". Please send me full description.

[enriquebonilla]

I have done the same my friend, but when I've published my .Net Web App in a ASP.Net server hosting I've received the same Exception. ¿Have you published your Web App in a Hosting Server with same results?

[legionhighlights]

I turned on the less secure app access but it still doesnt work. It says the same error but 5.7.0 instead of your 5.5.1 error

[MarcosGamingMLBB]

google block this seetings, have youany new solution?

[petermbugua]

Tutorial on how to send email, like one in your project.kindly

[vaishnavpayattu]

Could you please help me in outlook 365.

[abdessamadziani]

did everything on the vedio altought made my email in less secure this error stay face me " Le serveur SMTP requiert une connexion sécurisée ou le client n'était pas authentifié. La réponse du serveur était : 5.7.0 Authentication Required. Learn more at"