Last Modified: Oct 30, 2025
Affected Product(s):
BIG-IP AVR
Known Affected Versions:
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, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1
Fixed In:
13.1.0, 12.1.3.7
Opened: Mar 06, 2017 Severity: 3-Major Related Article:
K54018808
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
The 'Test Connection' button for the SMTP server configuration reports errors as expected.