DynamicID with email OTP not sending OTP

[chuka01]

I am configuring DynamicID as a second authentication factor for Remote Access VPN users. I have created an authentication profile, but when i try to authenticate, the email never arrives with the OTP in my mailbox. Below is an example of the smtp string format i used, and an image of my client: mail:TO=$EMAIL;SMTPSERVER=smtps://username:password@s
mtp.example.com;FROM=sslvpn@example.com;BODY=$RAWMESS
AGE. 

Debugging from cvpnd.elg does not explain any errors, but i can provide the logs as needed. Thanks in advance for your help!

 

[PhoneBoy]

What is the underlying SMTP server here? 

[chuka01]

Hi PhoneBoy,

Apologies for the late response. The SMTP server in use is Brevo. It does not log on the server's logs, and I get an error "DynamicID sending failure,To retry, please type r and select Submit". Thanks and looking forward to your response.

[PhoneBoy]

Can the gateway resolve the FDQN for the SMTP server?
Can you check that the gateway can actually reach the SMTP server (e.g. with telnet/netcat in expert mode) on port 25?

[chuka01 · Accepted solution]

Hi, thanks for your response. The gateway can successfully resolve the FQDN of the SMTP server over ports 587, 25 and 465. I have successfully resolved the issue. I just switched SMTP servers, and it worked. Thanks for the assistance.