Mailsetup errors

Hi, I setup wekan in a docker and everything work perfectly exepct mail. I use this mail string

MAIL_URL='smtps://[email protected]:[email protected]:465/'

But I get these error:

Exception while invoking method 'forgotPassword' { stack: 'Error: Email protocol in $MAIL_URL (\'smtps://[email protected]:[email protected]:465/\') must be \'smtp\' or \'smtps\'\n    at makeTransport (packages/email.js:45:11)\n    at getTransport (packages/email.js:78:24)\n    at Object.Email.send (packages/email.js:172:19)\n    at Object.Email.send (packages/mdg_meteor-apm-agent.js:3494:28)\n    at AccountsServer.Accounts.sendResetPasswordEmail (packages/accounts-password/password_server.js:715:9)\n    at DDPCommon.MethodInvocation.forgotPassword (packages/accounts-password/password_server.js:546:12)\n    at DDPCommon.MethodInvocation.methodMap.(anonymous function) (packages/mdg_meteor-apm-agent.js:2729:30)\n    at packages/check.js:128:16\n    at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1186:15)\n    at Object._failIfArgumentsAreNotAllChecked (packages/check.js:127:41)\n    at maybeAuditArgumentChecks (packages/ddp-server/livedata_server.js:1765:18)\n    at DDP._CurrentMethodInvocation.withValue (packages/ddp-server/livedata_server.js:719:19)\n    at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1186:15)\n    at DDPServer._CurrentWriteFence.withValue (packages/ddp-server/livedata_server.js:717:46)\n    at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1186:15)\n    at Promise (packages/ddp-server/livedata_server.js:715:46)',

Can somebody give me a hint? Thanks