Gmail: Sign-in attempt prevented

Device: Peplink Balance
Firmware: 6.3.0s026 build 3119

While attempting to configure Email Notification, following the steps outlined in the Peplink KB, I receive a “test failed” error whenever I click the [Send Test Notification] button:

[INFO] Try email through auto detected connection
[INFO] SMTP through SSL connected
<-] 220 smtp.gmail.com ESMTP m84sm19350740pfi.75 - gsmtp
->] EHLO balance.peplink.com
<-] 250-smtp.gmail.com at your service, [xxx.xxx.xxx.xxx]
<-] 250-SIZE 157286400
<-] 250-8BITMIME
<-] 250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
<-] 250-ENHANCEDSTATUSCODES
<-] 250-PIPELINING
<-] 250-CHUNKING
<-] 250 SMTPUTF8
->] AUTH PLAIN WxGCqZQjnBTPDwkAeXbzXlMoRTHhdlawLseW
<-] 534-5.7.14 <https://accounts.google.com/signin/continue?sarp=1&scc=1&plt=AKgnsbsT
[ERROR] [sent AUTH PLAIN WxGCqZQjnBTPDwkAeXbzXlMoRTHhdlawLseW
] [result 534] [expect 235] unknown response "534-5.7.14 <https://accounts.google.com/signin/continue?sarp=1&scc=1&plt=HDQcxmkU
"

Shortly after these test failures, I received an email from Google with the following security message:

Sign-in attempt prevented

Hi Jason,
Someone just tried to sign in to your Google Account foo@bar.com from an app that doesn’t meet modern security standards

Is there a known workaround for this, or is there a firmware update in the works to address this issue?

Kind regards,

Jason

Hi Jason,

This is related to the gmail account security setting that allowing other application to login. For more information, please refer to the URL below:

https://support.google.com/accounts/answer/6010255

Thank You

1 Like

Thanks for the workaround!