Mailer Validation Error: Failed to authenticate on SMTP server with username "byteoptics@tuneitpro.com" using the following authenticators: "LOGIN", "PLAIN". Authenticator "LOGIN" returned "Expected response code "235" but got code "535", with message "535 Incorrect authentication data".". Authenticator "PLAIN" returned "Expected response code "235" but got code "535", with message "535 Incorrect authentication data".".
#0 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/EsmtpTransport.php(177): Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport->handleAuth()
#1 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/EsmtpTransport.php(134): Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport->doEhloCommand()
#2 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(255): Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport->executeCommand()
#3 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(281): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->doHeloCommand()
#4 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(211): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->start()
#5 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/AbstractTransport.php(69): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->doSend()
#6 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(138): Symfony\Component\Mailer\Transport\AbstractTransport->send()
#7 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Mailer.php(38): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->send()
#8 /home/tunei960/billing3.tuneitpro.com/core/lib/mail.php(332): Symfony\Component\Mailer\Mailer->send()
#9 /home/tunei960/billing3.tuneitpro.com/admin/controller/pages/setting/setting.php(768): AMail->send()
#10 /home/tunei960/billing3.tuneitpro.com/admin/controller/pages/setting/setting.php(65): ControllerPagesSettingSetting->_validate()
#11 /home/tunei960/billing3.tuneitpro.com/core/engine/dispatcher.php(308): ControllerPagesSettingSetting->main()
#12 /home/tunei960/billing3.tuneitpro.com/core/engine/dispatcher.php(343): ADispatcher->dispatch()
#13 /home/tunei960/billing3.tuneitpro.com/core/engine/page.php(110): ADispatcher->dispatch()
#14 /home/tunei960/billing3.tuneitpro.com/core/engine/router.php(204): APage->build()
#15 /home/tunei960/billing3.tuneitpro.com/core/engine/router.php(86): ARouter->route()
#16 /home/tunei960/billing3.tuneitpro.com/index.php(95): ARouter->processRoute()
#17 {main}
why is this not working, have the exact same settings in v1.3.4, setting up v1.4.2 on same server but email is failing. And running php v8.3 Need some help!
Hello.
You're encountering this SMTP authentication error: 535 Incorrect authentication data
which means the SMTP server is rejecting the credentials you're providing
Quote from: Frogman on May 23, 2025, 02:13:27 PMMailer Validation Error: Failed to authenticate on SMTP server with username "byteoptics@tuneitpro.com" using the following authenticators: "LOGIN", "PLAIN". Authenticator "LOGIN" returned "Expected response code "235" but got code "535", with message "535 Incorrect authentication data".". Authenticator "PLAIN" returned "Expected response code "235" but got code "535", with message "535 Incorrect authentication data".".
#0 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/EsmtpTransport.php(177): Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport->handleAuth()
#1 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/EsmtpTransport.php(134): Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport->doEhloCommand()
#2 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(255): Symfony\Component\Mailer\Transport\Smtp\EsmtpTransport->executeCommand()
#3 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(281): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->doHeloCommand()
#4 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(211): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->start()
#5 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/AbstractTransport.php(69): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->doSend()
#6 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(138): Symfony\Component\Mailer\Transport\AbstractTransport->send()
#7 /home/tunei960/billing3.tuneitpro.com/vendor/symfony/mailer/Mailer.php(38): Symfony\Component\Mailer\Transport\Smtp\SmtpTransport->send()
#8 /home/tunei960/billing3.tuneitpro.com/core/lib/mail.php(332): Symfony\Component\Mailer\Mailer->send()
#9 /home/tunei960/billing3.tuneitpro.com/admin/controller/pages/setting/setting.php(768): AMail->send()
#10 /home/tunei960/billing3.tuneitpro.com/admin/controller/pages/setting/setting.php(65): ControllerPagesSettingSetting->_validate()
#11 /home/tunei960/billing3.tuneitpro.com/core/engine/dispatcher.php(308): ControllerPagesSettingSetting->main()
#12 /home/tunei960/billing3.tuneitpro.com/core/engine/dispatcher.php(343): ADispatcher->dispatch()
#13 /home/tunei960/billing3.tuneitpro.com/core/engine/page.php(110): ADispatcher->dispatch()
#14 /home/tunei960/billing3.tuneitpro.com/core/engine/router.php(204): APage->build()
#15 /home/tunei960/billing3.tuneitpro.com/core/engine/router.php(86): ARouter->route()
#16 /home/tunei960/billing3.tuneitpro.com/index.php(95): ARouter->processRoute()
#17 {main}
why is this not working, have the exact same settings in v1.3.4, setting up v1.4.2 on same server but email is failing. And running php v8.3 Need some help!
I had this exact same issue (and still do).
Its not the credentials, because these work fine on a separate vanilla install on the same server, same domain as a test.
Something is not storing the credentials somewhere or there is a change between updates breaking the working functionality, I mean, I have manually checked every file and just dont get why it doesnt work. File and Folder permissions were not correct I might add, following an update, but this was sorted and still doesnt solve the issue.
Let me know if you sorted it. :)
Hello,
Your SMTP server may block emails due to factors such as domain reputation, sending frequency, content or other restrictions.
Quote from: Basara on December 24, 2025, 06:49:01 AMHello,
Your SMTP server may block emails due to factors such as domain reputation, sending frequency, content or other restrictions.
Its not.
The reason I know this is because I added a separate fresh installment of abante on the same domain, just in a different folder with the same email details and it worked.
Something im fairly sure is breaking the site email function between updates.
So what i have had to do is import all my customers and products again to the new deployment and then move the site location to the original location.
Its the only way I got it sorted out and took ages.