#Barelinefeedsareillegal baseelements archive#
#Barelinefeedsareillegal baseelements upgrade#
#Barelinefeedsareillegal baseelements code#

Solves: Remote Server returned '550 5.6.11 SMTPSEND.BareLinefeedsAreIllegal message contains bare linefeeds, which cannot be sent via DATA and receiving system does not support BDAT'ĬontentTransferEncoding = ContentEncoding. MimeContentType = new ContentType('application', 'octet-stream') Ĭontent = new MimeContent(new MemoryStream(binar圜ontent)),ĬontentDisposition = new ContentDisposition If (!ContentType.TryParse(MimeTypes.GetMimeType(attachmentFileName), out var mimeContentType)) Protected MimePart CreateMimeAttachment(string attachmentFileName, byte binar圜ontent, DateTime cDate, DateTime mDate, DateTime rDate)

#Barelinefeedsareillegal baseelements archive#

Before this, messages were received by my archive box just fine. The failure was replaced by a retry response because the message was marked for retry if rejected. / A leaf-node MIME part that contains an attachment. Last Error: 400 4.4.7 The server responded with: 550 5.6.2 SMTPSEND.BareLinefeedsAreIllegal message contains bare linefeeds, which cannot be sent via DATA. / Date and time that the specified file or directory was last access to. / Date and time that the specified file or directory was last written to / Creation date and time for the specified file or directory / The array of unsigned bytes from which to create the attachment stream. / Create an file attachment for the binary data Then attachments are correctly encoded and the problem is gone. You need to add the bold marked line in the following code. The problem is the used MailKit NuGet package and the non conform usage of it. Reported error: 550 5.6.11 SMTPSEND.BareLinefeedsAreIllegal message contains bare linefeeds, which cannot be sent via DATA and receiving system does not support BDATĭSN generated by: ĭSN generated by: no one wants to help me, I have to help myself.

#Barelinefeedsareillegal baseelements code#

Most modern email servers support BDAT however, some free and older email servers don't support it.įor more information see Fix email delivery issues for error code 5.6.11 in Office 365.

#Barelinefeedsareillegal baseelements upgrade#

The industry standard recommendation to support SMTP chunking was published in 1998 so most devices manufactured during the last decade support this feature.Īnother option is for the email admin at the recipient's domain to upgrade their email servers to servers that support the SMTP protocol BDAT command. To fix this error, you'll need to replace the device with a newer model that supports the BDAT command. If the sender is using a device like a fax machine, printer, or scanner, it's likely an older model that doesn't support the SMTP protocol BDAT command.

Most modern email programs don't add bare line feed characters. To fix the issue, the sender should send the message using an email program or device that doesn't add bare line feed characters to messages. Chunking uses the SMTP protocol BDAT command, but the recipient's email server doesn't support the BDAT command. When bare line feed characters are included in a message, the SMTP protocol chunking feature is required to transmit the message between email servers. This error occurs when the email program or device used to create or send an email message adds bare line feed characters into the message. Was this helpful? Send feedback to Microsoft. If the problem continues send this non-delivery report (NDR) message to your email admin for assistance. Try using a different email program to send your message. It appears that your email program added invalid characters (bare line feed characters) into your message when you sent it. Your message contains invalid characters (bare line feed characters) which the email servers at att.net don't support. I've tested with other servers and there are no problems.

It appears Thunderbird is using something that these emails won't accept. I have my settings to port 587 and security to STARTTLS. Now I can not send emails to only certain addresses such as att.net &. GoDaddy recently updated their mail servers to outlook.office 365.