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Power Monitoring Expert v2020: Native Event Notification fails to send email notifications when SMTP authentication is required.

Issue
PME 2020 Event Notification fails to send email notifications emails through SMTP server ‘mail.smtp2go.com’ using ports 2525 / 80 / 25 / 8025 / 587 and observed below error in the PME event log –

LogClientException: System.Net.Mail.SmtpFailedRecipientException: Mailbox unavailable. The server response was: relay access denied - please authenticate
at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at Notifications.Core.Delivery.DeliverToEmail.SendEmail(String recipientEmailAddress, String subject, String htmlContent, String textContent)
LogClient: Notifications.Core::Notifications.Core.Delivery.DeliverToEmail::SendEmail

Environment
PME v2020.

Cause
PME is using older .NET mail client which is not passing the required Authentication to the SMTP Servers.

Resolution
*Warning: Take backups of any files prior to modifying/replacing them. Ensure the backups are in a location that will not be overwritten (i.e. the Desktop).
To fix this issue, apply steps mentioned as below -

Download the attached 'PME2020_Hotfix_CU_Notifications.Core-Release.0.0.20133.02.zip' file and unzip (which contains hotfix files).
Close all PME thick applications if they are opened and stop all PME (ION) windows services.
Copy the downloaded files to respective folders in PME installed directory like – ‘C:\Program Files (x86)\Schneider Electric\Power Monitoring Expert\Applications\bin’ and ‘C:\Program Files (x86)\Schneider Electric\Power Monitoring Expert\system\bin’
Start the PME services (or reboot machine, which automatically start services during system startup).

Now test the notification using SMTP server ‘smtp.smtp2go.com’ (using any of the supported ports -2525 / 80 / 25 / 8025 / 587).

Note: This hotfix is available with CU2 i.e PME 2020 CU2. (located at - https://community.exchange.se.com/t5/EcoStruxure-Power-Monitoring/PME2020-Download-PME-2020-Cumulative-Update-2-is-now-available/td-p/254080 or https://schneider-electric.app.box.com/s/58htakapfm2dppgo6aeus91q3f08r2xv)