B4J Question SMTP response 421 received. Server closed connection.

Angelo Messina

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hi all, with B4J is it possible to send simple email alerts only to one user?
i tried with the net library, but it doesn't send anything
it always comes back to me
org.apache.commons.net.smtp.SMTPConnectionClosedException: SMTP response 421 received. Server closed connection.
 
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EnriqueGonzalez

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Yes it is possible and quite simple, you might have an error in your SMTP configuration, better to share some code hiding the sensitive information.
 
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EnriqueGonzalez

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Longtime User
Angelo Messina said:
I copied the source of Erel as it was, I added user and password and Gmail.com
Click to expand...
For gmail you need to add 3rd party apps to be able to access.

Less secure apps & your Google Account - Google Account Help

Starting January 2025, less secure apps, third-party apps, or devices that have you sign in with only your username and password will no longer be supported for Google Workspace accounts. For exact
support.google.com

they actually give you an extra code that you will use as the password
 
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