Error "Authentication failed" when sending mail since v2.35.4

[koffienl]

Describe the bug
Authentication failure when trying to send a email.
Since v2.35.4 I get an error when sending mail: "Authentication failed"
Reverting back to v2.35.3 works without any issue.
Before testing previous snappymail version I tried several other SMTP clients and non gave any issue.

To Reproduce
Login and try to send a email. I'm getting a "authentication failed" message.

Please complete the following information:
I'm running docker with image djmaze/snappymail:latest
Snappymail version 2.35.4

Debug/logging information
{"Action":"Unknown","Result":false,"ErrorCode":903,"ErrorMessage":"InvalidInputArgument[903]","ErrorMessageAdditional":"Action unknown","ExceptionCode":0,"epoch":1711364413}

Error on console:

SMTP[ERROR]: MailSo\Smtp\Exceptions\NegativeResponseException: 535 5.7.8 535 Incorrect authentication data in /snappymail/snappymail/v/2.35.4/app/libraries/MailSo/Smtp/SmtpClient.php:596
Stack trace:
#0 /snappymail/snappymail/v/2.35.4/app/libraries/MailSo/Smtp/SmtpClient.php(504): MailSo\Smtp\SmtpClient->validateResponse(Array, '')
#1 /snappymail/snappymail/v/2.35.4/app/libraries/MailSo/Smtp/SmtpClient.php(192): MailSo\Smtp\SmtpClient->sendRequestWithCheck('AHJpY2hhcmQAWkV...', 235, true)
#2 /snappymail/snappymail/v/2.35.4/app/libraries/RainLoop/Model/Account.php(257): MailSo\Smtp\SmtpClient->Login(Object(MailSo\Smtp\Settings))
#3 /snappymail/snappymail/v/2.35.4/app/libraries/RainLoop/Model/Account.php(223): RainLoop\Model\Account->netClientLogin(Object(MailSo\Smtp\SmtpClient), Object(RainLoop\Plugins\Manager))
#4 /snappymail/snappymail/v/2.35.4/app/libraries/RainLoop/Actions/Messages.php(772): RainLoop\Model\Account->SmtpConnectAndLogin(Object(RainLoop\Plugins\Manager), Object(MailSo\Smtp\SmtpClient))
#5 /snappymail/snappymail/v/2.35.4/app/libraries/RainLoop/Actions/Messages.php(176): RainLoop\Actions->smtpSendMessage(Object(RainLoop\Model\MainAccount), Object(MailSo\Mime\Message), Resource id #28, 770, true, false, false)
#6 /snappymail/snappymail/v/2.35.4/app/libraries/RainLoop/ServiceActions.php(134): RainLoop\Actions->DoSendMessage()
#7 /snappymail/snappymail/v/2.35.4/app/libraries/RainLoop/Service.php(132): RainLoop\ServiceActions->ServiceJson('')
#8 /snappymail/snappymail/v/2.35.4/app/libraries/RainLoop/Service.php(14): RainLoop\Service::RunResult()
#9 /snappymail/snappymail/v/2.35.4/include.php(135): RainLoop\Service::Handle()
#10 /snappymail/index.php(11): include('/snappymail/sna...')
#11 {main}

[the-djmaze]

We need debug info to check.

Like:

SMTP[INFO]: Start connection to "tcp://localhost:25"
SMTP[INFO]: Connect (success)
SMTP[INFO]: < 220 snappymail.eu ESMTP\r\n
SMTP[INFO]: > EHLO snappymail.eu\r\n
SMTP[INFO]: < 250-snappymail.eu\r\n
SMTP[INFO]: < 250-PIPELINING\r\n
SMTP[INFO]: < 250-SIZE 256000000\r\n
SMTP[INFO]: < 250-ETRN\r\n
SMTP[INFO]: < 250-STARTTLS\r\n
SMTP[INFO]: < 250-ENHANCEDSTATUSCODES\r\n
SMTP[INFO]: < 250-8BITMIME\r\n
SMTP[INFO]: < 250-DSN\r\n
SMTP[INFO]: < 250 SMTPUTF8\r\n
SMTP[INFO]: > STARTTLS\r\n
SMTP[INFO]: < 220 2.0.0 Ready to start TLS\r\n
SMTP[INFO]: > EHLO snappymail.eu\r\n
SMTP[INFO]: < 250-snappymail.eu\r\n
SMTP[INFO]: < 250-PIPELINING\r\n
SMTP[INFO]: < 250-SIZE 256000000\r\n
SMTP[INFO]: < 250-ETRN\r\n
SMTP[INFO]: < 250-AUTH PLAIN LOGIN\r\n
SMTP[INFO]: < 250-ENHANCEDSTATUSCODES\r\n
SMTP[INFO]: < 250-8BITMIME\r\n
SMTP[INFO]: < 250-DSN\r\n
SMTP[INFO]: < 250 SMTPUTF8\r\n
SMTP[INFO]: > AUTH PLAIN\r\n
SMTP[INFO]: < 334 \r\n
SMTP[INFO]: > ********\r\n
SMTP[INFO]: < 235 2.7.0 Authentication successful\r\n

[koffienl]

[2024-03-25 13:55:16.819][d3e58896] JSON[INFO]: Action: DoSendMessage                                                                                                                                       
[2024-03-25 13:55:16.819][d3e58896] POST[INFO]: {"identityID":"","messageFolder":"","messageUid":0,"saveFolder":"Sent","from":"<user@domain.com>","to":"test@domein.nl","cc":"","bcc":"","repl
yTo":"","subject":"tt","draftInfo":null,"inReplyTo":"","references":"","markAsImportant":0,"attachments":[],"dsn":0,"requireTLS":0,"readReceiptRequest":0,"autocrypt":[],"linkedData":[],"html":"<div>tt<\/d
iv>","plain":"tt","Action":"SendMessage"}                                                                                                                                                                   
[2024-03-25 13:55:16.820][d3e58896] IMAP[INFO]: Start connection to "tcp://192.168.2.25:143"                                                                                                                
[2024-03-25 13:55:16.820][d3e58896] IMAP[INFO]: Connect (success)                                                                                                                                           
[2024-03-25 13:55:16.820][d3e58896] IMAP[DEBUG]: 0.00032687187194824 (raw connection)                                                                                                                       
[2024-03-25 13:55:16.820][d3e58896] IMAP[INFO]: < * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ STARTTLS AUTH=PLAIN] Dovecot ready.\r\n                                        
[2024-03-25 13:55:16.821][d3e58896] IMAP[DEBUG]: 0.00083398818969727 (*)                                                                                                                                    
[2024-03-25 13:55:16.821][d3e58896] IMAP[INFO]: > TAG1 AUTHENTICATE PLAIN *******\r\n                                                                                                                       
[2024-03-25 13:55:16.838][d3e58896] IMAP[INFO]: < TAG1 OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL
-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY PREVIEW 
STATUS=SIZE SAVEDATE LITERAL+ NOTIFY SPECIAL-USE] Logged in\r\n                                                                                                                                             
[2024-03-25 13:55:16.839][d3e58896] IMAP[DEBUG]: 0.017486095428467 (TAG1)                                                                                                                                   
[2024-03-25 13:55:16.846][d3e58896] SMTP[INFO]: Start connection to "ssl://smtp.bhosted.nl:465"                                                                                                             
[2024-03-25 13:55:16.900][d3e58896] SMTP[INFO]: Connect (success)                                                                                                                                           
[2024-03-25 13:55:16.900][d3e58896] SMTP[DEBUG]: 0.053545951843262 (raw connection)                                                                                                                         
[2024-03-25 13:55:16.913][d3e58896] SMTP[INFO]: < 220 smtp.bhosted.nl ESMTP\r\n                                                                                                                             
[2024-03-25 13:55:16.914][d3e58896] SMTP[INFO]: > EHLO ...com\r\n                                                                                                                            
[2024-03-25 13:55:16.927][d3e58896] SMTP[INFO]: < 250-smtp.bhosted.nl\r\n                                                                                                                                   
[2024-03-25 13:55:16.927][d3e58896] SMTP[INFO]: < 250-PIPELINING\r\n                                                                                                                                        
[2024-03-25 13:55:16.927][d3e58896] SMTP[INFO]: < 250-SIZE 41943040\r\n                                                                                                                                     
[2024-03-25 13:55:16.927][d3e58896] SMTP[INFO]: < 250-AUTH LOGIN PLAIN\r\n                                                                                                                                  
[2024-03-25 13:55:16.927][d3e58896] SMTP[INFO]: < 250-ENHANCEDSTATUSCODES\r\n                                                                                                                               
[2024-03-25 13:55:16.927][d3e58896] SMTP[INFO]: < 250-8BITMIME\r\n                                                                                                                                          
[2024-03-25 13:55:16.927][d3e58896] SMTP[INFO]: < 250 SMTPUTF8\r\n                                                                                                                                          
[2024-03-25 13:55:16.930][d3e58896] SMTP[INFO]: > AUTH PLAIN\r\n                                                                                                                                            
[2024-03-25 13:55:16.942][d3e58896] SMTP[INFO]: < 334 \r\n                                                                                                                                                  
[2024-03-25 13:55:16.943][d3e58896] SMTP[INFO]: > ********\r\n                                                                                                                                              
[2024-03-25 13:55:16.955][d3e58896] SMTP[INFO]: < 535 5.7.8 535 Incorrect authentication data\r\n                                                                                                           
[2024-03-25 13:55:16.958][d3e58896] SMTP[ERROR]: MailSo\Smtp\Exceptions\NegativeResponseException: 535 5.7.8 535 Incorrect authentication data in /snappymail/snappymail/v/2.35.4/app/libraries/MailSo/Smtp/
SmtpClient.php:596                                                                     ```

[the-djmaze]

As i can see, the login for IMAP is different compared to SMTP.
Do you have:?

[koffienl]

As i can see, the login for IMAP is different compared to SMTP. Do you have:?

I don't have the lowercase setting, other than that: yes these are my settings.
Just to be clear: this setup with local IMAP and remote SMTP with current settings works in previous versions. I can reproduce by using v2.35.4

[the-djmaze]

Just to be clear: this setup with local IMAP and remote SMTP

Your local IMAP uses "short login" but the remote SMTP does not.
That's why it failed, because the "short login" was passed to SMTP.