Resend verification email failure

Description:

Attempts to Resend verification email fail, but I can successfully send a test email. SMTP setup using a gmail address.

Steps to reproduce:

1. Set up SMTP server using gmail.
2. Click on "Send a test email to my user"
3. Go to Avatar-> My Account -> Profile -> Resend verification email.

Expected behavior:

• Test email successfully sends.
• Verification email successfully sends.

Actual behavior:

• Test email successfully sends
• "Error sending email" message appears when attempting to send verification email.

Server Setup Information:

• Version of Rocket.Chat Server: 3.6.2
• Operating System: Ubuntu 20.04.1
• Deployment Method: snap
• Number of Running Instances: 1
• DB Replicaset Oplog:
• NodeJS Version: 12.16.1
• MongoDB Version: 3.6.14

Client Setup Information

• Desktop App or Browser Version: Both
• Operating System: MacOS, Windows, Linux

Additional context

Relevant logs:

Server logs on failure:

I20201016-12:22:48.159(0) API ➔ debug POST: /api/v1/method.call/sendConfirmationEmail 


I20201016-12:22:48.162(0) Meteor ➔ method sendConfirmationEmail -> userId: BWnNCxJ2wNskN7NJ4, arguments: ["dw@stuycs.org"] 


I20201016-12:22:48.581(0) Exception while invoking method sendConfirmationEmail Error: Error trying to send email: Mail command failed: 555 5.5.2 Syntax error. n9sm2114054ilj.74 - gsmtp [error-email-send-failed]     at MethodInvocation.sendConfirmationEmail (server/methods/sendConfirmationEmail.js:21:10)     at MethodInvocation.methodsMap.<computed> (app/lib/server/lib/debug.js:67:34)     at maybeAuditArgumentChecks (packages/ddp-server/livedata_server.js:1771:12)     at packages/ddp-server/livedata_server.js:1689:15     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)     at packages/ddp-server/livedata_server.js:1687:36     at new Promise (<anonymous>)     at Server.applyAsync (packages/ddp-server/livedata_server.js:1686:12)     at Server.apply (packages/ddp-server/livedata_server.js:1625:26)     at Server.call (packages/ddp-server/livedata_server.js:1607:17)     at Object.post (app/api/server/v1/misc.js:262:26)     at app/api/server/api.js:394:82     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)     at Object._internalRouteActionHandler [as action] (app/api/server/api.js:394:39)     at Route.share.Route.Route._callEndpoint (packages/nimble_restivus/lib/route.coffee:150:32)     at packages/nimble_restivus/lib/route.coffee:59:33     at packages/simple_json-routes.js:98:9  => awaited here:     at Promise.await (/snap/rocketchat-server/1442/programs/server/npm/node_modules/meteor/promise/node_modules/meteor-promise/promise_server.js:60:12)     at Server.apply (packages/ddp-server/livedata_server.js:1638:22)     at Server.call (packages/ddp-server/livedata_server.js:1607:17)     at Object.post (app/api/server/v1/misc.js:262:26)     at app/api/server/api.js:394:82     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)     at Object._internalRouteActionHandler [as action] (app/api/server/api.js:394:39)     at Route.share.Route.Route._callEndpoint (packages/nimble_restivus/lib/route.coffee:150:32)     at packages/nimble_restivus/lib/route.coffee:59:33     at packages/simple_json-routes.js:98:9 

Server logs on success:

I20201016-14:15:35.981(0) API ➔ debug POST: /api/v1/method.call/sendSMTPTestEmail 

I20201016-14:15:35.983(0) Meteor ➔ method sendSMTPTestEmail -> userId: BWnNCxJ2wNskN7NJ4, arguments: [] 

I20201016-14:15:35.990(0) API ➔ debug Success {   statusCode: 200,   body: {     message: '{"msg":"result","id":"37","result":{"message":"Your_mail_was_sent_to_s","params":["dw@stuycs.org"]}}',     success: true   } } 

Start with server/methods/sendConfirmationEmail.js at the failing sendConfirmationEmail method, then compare its behavior with the successful sendSMTPTestEmail method described in the logs. Reproduce the failure using the listed Gmail SMTP setup and inspect the 555 error; done means Resend verification email succeeds without the error.