Error: email send authentication failed

Posted on
Wed Jul 08, 2020 6:56 am
bbruck offline
Posts: 326
Joined: Oct 05, 2008

Error: email send authentication failed

I'm getting this error every 10 minutes. I have not changed my email.

I'm trying to send to my personal gmail account:
SMTP Server:
Port: 587
Use SSL/TLS: yes
SMTP user name:
SMTP password: [my gmail password]
Reply-to email address:

Any ideas?

Posted on
Thu Jul 09, 2020 3:27 pm
matt (support) offline
Site Admin
User avatar
Posts: 20088
Joined: Jan 27, 2003
Location: Texas

Re: Error: email send authentication failed

See the post on this thread.

Note we are recommending using the Better Email Plugin for sending and scanning/triggering on emails now. Switching to that likely won't fix this problem (as that post describes it is also an isssue for it), so this is just an FYI.


Posted on
Fri Jul 10, 2020 9:46 pm
johnfdl offline
Posts: 173
Joined: May 18, 2017
Location: Atlanta, GA USA

Re: Error: email send authentication failed

I had this problem and fixed it by generating an app password in Google as follows:

1. Go here:
2. Log into your google account (if you are not already)
3. Under "Signing into Google", click App Passwords
4. Select App = Mail and Device = Mac
5. Click Generate
6. Copy password and paste into Indigo as your google password

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