Bug ID 649177: Testing for connection to SMTP Server always returns "OK"

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP AVR(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:

Opened: Mar 06, 2017
Severity: 3-Major
Related AskF5 Article:


When you click the SMTP GUI config "Test Connection" button it always gives green "OK" response, even if there is no network, or if the DNS response is NXDomain.


Validation of SMTP server availability is incorrect


This is encountered when testing the SMTP connection using the GUI.


You can test SMTP at the command line by attempting to send a test email, as in this example (substitute user@example.com with your valid email address): # echo "ssmtp test mail" | mail -vs "Test email" user@example.com

Fix Information

The 'Test Connection' button for the SMTP server configuration reports errors as expected.

Behavior Change