SMTP error: No compatible authentication mechanisms found

[MaxyArthes]

I tried to send a mail via SMTP but I keep getting that error:
System.NotSupportedException: No compatible authentication mechanisms found.

I’m using a private SMTP server, so I won’t be able to tell it here.

but I tried using:
Server: outlook.office365.com
Port: 587

without any issue, so I’m not really looking at a solution specific to UiPath, but more for people who had the same problem and know what need to be changed on the SMTP server.

[asesor-rpa (Nestor Andres Martinez)]

@MaxyArthes

No compatible authentication mechanisms found.

Were you trying with a SSL Enabled connection?

[MaxyArthes]

SecureConnection: SslOnConnection ?
If so, I was using ‘Auto’ but using SslOnConnection give me :
System.IO.IOException: The handshake failed due to an unexpected packet format.

[asesor-rpa (Nestor Andres Martinez)]

Try setting SecureConnection Property with “StartTls”

[Palaniyappan (Forum Leader)]

Kindly have a look on this once buddy, try with . net method of sending mail invoke method Activity

SMTP Authentication with Microsoft Exchange Server

Encountered this issue at two different places. First place agreed to change their server settings so it could work. Second place, I decided to try write it using .NET directly, which turned out to be quite easy as you can just use the SmtpClient class. e.g. Invoke Method Target Type: (null) Target: new SmtpClient(server,port) Method: Send Parameter collection: String = sender (any valid address) String = recipient String = subject String = body (Could equally create a MailMessage obj…

Cheers @MaxyArthes

[MaxyArthes]

Tried this, I actually got no error but never received the email using invoke method.