Welcome mail error

[daktur]

Hi everyone,

I am facing this error when testing the mail configuration for the system:

MailKit.Net.Smtp.SmtpCommandException: 5.7.1 <[email protected]>: Sender address rejected: UOLHOST-SMTP-SMTP-BO-706-235096 Restricted e-mail, delivery not allowed. Visit http://postmaster.uol.com.br/ for help. at MailKit.Net.Smtp.SmtpClient.ProcessRcptToResponse(MimeMessage message, MailboxAddress mailbox, SmtpResponse response) at MailKit.Net.Smtp.SmtpClient.FlushCommandQueue(MimeMessage message, MailboxAddress sender, IList`1 recipients, CancellationToken cancellationToken) at MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, MailboxAddress sender, IList`1 recipients, CancellationToken cancellationToken, ITransferProgress progress) at MailKit.Net.Smtp.SmtpClient.Send(FormatOptions options, MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) at MailKit.MailTransport.Send(MimeMessage message, CancellationToken cancellationToken, ITransferProgress progress) at GenericUtilsNet.Mail.Send(AlternateView calendarData) Response:

Any ideas? Should i contact mail e-mail provider?

Thanks!

 

[cloudphonesystem.net]

is your mailserver allowing your PBX's IP to send email is it on the allowed senders list?

 

[daktur]

@cloudphonesystem.net

It was working until a few days ago.