邮件发送失败

{"TimeStamp":1648457553,"HostName":"080c0cb5dd0e","ServiceType":6,"Developer":0,"ClientIp":"","Stack":"2f386241774bacd-d2099 Mail rejected\n at MailKit.Net.Smtp.SmtpClient.DataAsync(FormatOptions options, MimeMessage message, Int64 size, Boolean doAsync, CancellationToken cancellationToken, ITransferProgress progress)\n at MailKit.Net.Smtp.SmtpClient.SendAsync(FormatOptions options, MimeMessage message, MailboxAddress sender, IList 1 recipients, Boolean doAsync, CancellationToken cancellationToken, ITransferProgress progress)\n at MailKit.Net.Smtp.SmtpClient.SendAsync(FormatOptions options, MimeMessage message, MailboxAddress sender, IList 1 recipients, Boolean doAsync, CancellationToken cancellationToken, ITransferProgress progress)\n at MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress)\n at MD.Email.Core.Senders.SendByMailKit.SendAsync(SmtpSecret smtpSecret, EmailInfo emailInfo, AppSettings options) in /data/jenkins/workspace/emailservice/MD.Email.Core/Senders/SendByMailKit.cs:line 96","Message":"MailKit 发送失败，["zhuzs@chinatowercom.cn","wangwen88832@foxmail.com","15206227006@139.com"]","Action":"","AccountId":"","ProjectId":"","Level":3,"Extras":{},"ServiceName":"emailsenderservice","RequestId":"","LevelName":"error","Endpoint":"","ElapsedMilliSeconds":0,"TimeOn":"2022-03-28 08:52:33.333"}