Send Email using SMTP Client (Labview Example 2016) Error 56

[SteveMaxN]

Hello dear community I have the following problem:

I use the Example VI: Send Email using SMTP Client

However, I always get the following error message:

Error 56 on LabVIEWSMTPClient.lvlib:Send.vi:2280001
Possible causes:

LabVIEW: The network operation has exceeded the time limit specified by the user or system.

Complete call chain:
LabVIEWSMTPClient.lvlib:Send.vi:2280001
Send Email using SMTP Client.vi

I use a gmail address as the email address.
As SMTP address I use: smtp.gmail.com
And as port I use: 465

My firewall allows all access, also I have enabled third party apps in my Gmail account.

Unfortunately it still does not work.
It would be very kind if someone could help me.

[Bob_Schor]

Several years ago, I tried to develop a monitoring program that would e-mail a list of recipients if "something goes wrong".  During development and testing, I recall trying to use gmail as my outgoing SMTP server, and having it not work.  As it happened, my organization (on whose network I was running) had its own SMTP server that used Port 25, and this worked for us.

I think I remember reading that Google had put some restrictions on user using gmail as an SMTP server.  I remember trying "various things", then giving up when the "internal" method worked.

Bob Schor