We used our Gmail credentials in Nodemailer to send test emails in development. We tried sending one today with the same configuration as yesterday and received the following error:
2020-05-04T10:17:35.547Z Error: Invalid login: 535-5.7.8 Username and Password not accepted. Learn more at
04/05/2020 12:17:35 535 5.7.8 https://support.google.com/mail/?p=BadCredentials s18sm19281474wra.94 - gsmtp
04/05/2020 12:17:35 at SMTPConnection._formatError (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:784:19)
04/05/2020 12:17:35 at SMTPConnection._actionAUTHComplete (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:1523:34)
04/05/2020 12:17:35 at SMTPConnection.<anonymous> (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:550:26)
04/05/2020 12:17:35 at SMTPConnection._processResponse (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:942:20)
04/05/2020 12:17:35 at SMTPConnection._onData (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:749:14)
04/05/2020 12:17:35 at TLSSocket.SMTPConnection._onSocketData (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:195:44)
04/05/2020 12:17:35 at TLSSocket.emit (events.js:310:20)
04/05/2020 12:17:35 at addChunk (_stream_readable.js:286:12)
04/05/2020 12:17:35 at readableAddChunk (_stream_readable.js:268:9)
04/05/2020 12:17:35 at TLSSocket.Readable.push (_stream_readable.js:209:10)
04/05/2020 12:17:35 2020-05-04T10:17:34.439Z RES e77bea28-7092-4ec5-81b7-8230bd068e5a POST /projects/111/items 201 1117
04/05/2020 12:17:35 2020-05-04T10:17:35.588Z Error: Invalid login: 535-5.7.8 Username and Password not accepted. Learn more at
04/05/2020 12:17:35 535 5.7.8 https://support.google.com/mail/?p=BadCredentials p7sm18057972wrf.31 - gsmtp
04/05/2020 12:17:35 at SMTPConnection._formatError (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:784:19)
04/05/2020 12:17:35 at SMTPConnection._actionAUTHComplete (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:1523:34)
04/05/2020 12:17:35 at SMTPConnection.<anonymous> (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:550:26)
04/05/2020 12:17:35 at SMTPConnection._processResponse (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:942:20)
04/05/2020 12:17:35 at SMTPConnection._onData (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:749:14)
04/05/2020 12:17:35 at TLSSocket.SMTPConnection._onSocketData (/home/node/backend/node_modules/nodemailer/lib/smtp-connection/index.js:195:44)
04/05/2020 12:17:35 at TLSSocket.emit (events.js:310:20)
04/05/2020 12:17:35 at addChunk (_stream_readable.js:286:12)
I did some research and discovered that I was supposed to turn on "Less secure apps" but I can't find the settings.
When I visit https://myaccount.google.com/lesssecureapps, I get "Settings could not be read"
It was a temporary problem on Google's side. By 11:44 UTC it was back for us. https://twitter.com/gsuite/status/1257266044957319169?s=20