Hi,
There is not an official app, but about SMTP configuration refer to https://help.qlik.com/en-US/nprinting/September2019/Content/NPrinting/AdministeringQVNprinting/Set-u....
The most frequent problem with SMTP servers is that they have anti-spam rules and they identify emails from Qlik NPrinting as spam. So Qlik NPrinting correctly delivers emails to the SMTP (and you see no errors in Qlik NPrinting logs) but after the SMTP doesn't deliver the messages.
Another frequent problem with SMTP server is that emails have too big reports attachment. For example your SMTP server is configured to deliver emails with a maximum size of 10Mb but Qlik NPRinting attached 20Mb of reports. So it could be that some emails are delivered and some other not because only some emails exceed the maximum admitted size.
Best Regards,
Ruggero
Best Regards,
Ruggero
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