Problems sending e-mail reports

Fresh Duplicati - 2.0.3.3_beta_2018-04-02 install on Microsoft Windows Server 2012 Standard 6.2.9200
Outlook:

Running commandline entry

Finished!

Input command: send-mail

Input arguments:

Input options:
send-mail-any-operation: true
send-mail-from: ***@outlook.com
send-mail-to: ***@outlook.com
send-mail-url: smtps://smtp.office365.com:587?starttls=always
send-mail-username: ***@outlook.com
send-mail-password: ***
log-level: Profiling
verbose:
backup-name: TST
dbpath: C:\Users\Administrator\AppData\Local\Duplicati\SSOVJNOLHD.sqlite
encryption-module: true
compression-module: zip
dblock-size: 50mb
no-encryption: true
disable-module: console-password-input

Starting - Running SendMail
Running SendMail took 00:00:00.008

Failed to send email: System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
→ System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
=> Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
Return code: 0

Gmail-TLS:

Running commandline entry

Finished!

Input command: send-mail

Input arguments:

Input options:
send-mail-any-operation: true
send-mail-from: ***@gmail.com
send-mail-to: ***@gmail.com
send-mail-url: smtps://smtp.gmail.com:587?starttls=always
send-mail-username: ***@gmail.com
send-mail-password: ***
log-level: Profiling
verbose:
backup-name: TST
dbpath: C:\Users\Administrator\AppData\Local\Duplicati\SSOVJNOLHD.sqlite
encryption-module: true
compression-module: zip
dblock-size: 50mb
no-encryption: true
disable-module: console-password-input

Starting - Running SendMail
Running SendMail took 00:00:00.007

Failed to send email: System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
→ System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
=> Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
Return code: 0

Gmail-SSL:

Running commandline entry

Finished!

Input command: send-mail

Input arguments:

Input options:
send-mail-any-operation: true
send-mail-from: ***@gmail.com
send-mail-to: ***@gmail.com
send-mail-url: smtps://smtp.gmail.com:465
send-mail-username: ***@gmail.com
send-mail-password: ***
log-level: Profiling
verbose:
backup-name: TST
dbpath: C:\Users\Administrator\AppData\Local\Duplicati\SSOVJNOLHD.sqlite
encryption-module: true
compression-module: zip
dblock-size: 50mb
no-encryption: true
disable-module: console-password-input

Starting - Running SendMail
Running SendMail took 00:00:00.009

Failed to send email: System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
=> The remote certificate is invalid according to the validation procedure.
Return code: 0

Any help appreciated,
thanks in advance.

Have you checked this thread: E-mail notification problems to Gmail ?

Of course, as the developer of duplicati-monitoring.com , I have to mention that the easiest way to get Duplicati reports by email is our service :wink: