2026-03-19 11:20:00.7361|Error|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain
   bei MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, MailboxAddress sender, IList`1 recipients, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:Zeile 2448.
   bei MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:Zeile 2531.
   bei MailKit.MailTransport.Send(MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\MailTransport.cs:Zeile 120.
   bei WSEnVersOnVerw.WSEnVersOnVerw.EmailService.SendMail(MimeMessage message) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\Mail.cs:Zeile 68.
2026-03-19 11:20:00.8298|Error|Error sending a mailkit mail.|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain
   bei WSEnVersOnVerw.WSEnVersOnVerw.EmailService.SendMail(MimeMessage message) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\Mail.cs:Zeile 73.
   bei WSEnVersOnVerw.Service1.sendMail(String auth, String addr_to, String subject, String html_content, String text_content, String mandant) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\WSEnVersOnVerw.asmx.cs:Zeile 765.
2026-03-19 11:37:06.2792|Error|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain
   bei MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, MailboxAddress sender, IList`1 recipients, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:Zeile 2448.
   bei MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:Zeile 2531.
   bei MailKit.MailTransport.Send(MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\MailTransport.cs:Zeile 120.
   bei WSEnVersOnVerw.WSEnVersOnVerw.EmailService.SendMail(MimeMessage message) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\Mail.cs:Zeile 68.
2026-03-19 11:37:06.2792|Error|Error sending a mailkit mail.|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain
   bei WSEnVersOnVerw.WSEnVersOnVerw.EmailService.SendMail(MimeMessage message) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\Mail.cs:Zeile 73.
   bei WSEnVersOnVerw.Service1.sendMail(String auth, String addr_to, String subject, String html_content, String text_content, String mandant) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\WSEnVersOnVerw.asmx.cs:Zeile 765.
2026-03-19 11:50:02.2845|Error|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain
   bei MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, MailboxAddress sender, IList`1 recipients, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:Zeile 2448.
   bei MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\Net\Smtp\SmtpClient.cs:Zeile 2531.
   bei MailKit.MailTransport.Send(MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) in D:\src\MailKit\MailKit\MailTransport.cs:Zeile 120.
   bei WSEnVersOnVerw.WSEnVersOnVerw.EmailService.SendMail(MimeMessage message) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\Mail.cs:Zeile 68.
2026-03-19 11:50:02.2845|Error|Error sending a mailkit mail.|MailKit.Net.Smtp.SmtpCommandException: 5.7.54 SMTP; Unable to relay recipient in non-accepted domain
   bei WSEnVersOnVerw.WSEnVersOnVerw.EmailService.SendMail(MimeMessage message) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\Mail.cs:Zeile 73.
   bei WSEnVersOnVerw.Service1.sendMail(String auth, String addr_to, String subject, String html_content, String text_content, String mandant) in C:\GitLab-Runner\builds\fn1XNVWs\0\is\winev\web\winev-web-net-origin\WSEnVersOnVerw\WSEnVersOnVerw.asmx.cs:Zeile 765.