The whole BDAT thing seems to be a way of allowing the length of message content to be indicated up front (a bit like Content-Length in HTTP, maybe) instead of a blank CRLF line needing to be detected. SMTPSEND.BareLineFeedsAreIllegal NDR received by Exchange Online or EOP users in Office 365 Dedicated/ITAR Here's what Microsoft have to say about it: Sounds like a delicious combination of Thunderbird's notorious stewardship issues (Mozilla throwing it over the side several times as they doggedly focus on trying to monetise the Web) and Microsoft's celebrated attitudes towards interoperability ("Sorry it broke, why not buy our products instead?"). I've no idea what! I didn't know line feeds were illegal, I'm sure I've been using them for about 40 years now and I'm not in prison yet. My e-mail provider says they don't want to allow "bare line feed" messages into their server as there may be a security implication. 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' We haven't changed the eMail-Templates nor the eMail server.
The same sender can send the same message through Thunderbird using a Gmail account and it works, that's the only solution we have at the minute.
#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.
#Barelinefeedsareillegal baseelements update
Looks to have happened overnight following a Thunderbird update by the sender, I have tried to revert to an earlier version but it won't read the profile any more if I do that. 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. This occurs when the expected CR-LF combination at the end of message is missing or incorrect. If the recipient's email server is Exchange. Bare Line Feeds are an element in email messages that are 'illegal' formatting as defined by the Request for Comments (RFC) 2822. For example, Receive connectors in Exchange Server support the BareLinefeedRejectionEnabled setting. Some email servers support the ability to disable bare line feed rejection. 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' Solution 1: Disable bare line feed rejection (allow messages that contain bare line feeds) in the destination email server. 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.Code: Select all The mail client submitted this message with bare line feeds, which cannot be sent via SMTP protocol DATA command and receiving system does not support BDAT. Threats include any threat of suicide, violence, or harm to another. MimeContentType = new ContentType("application", "octet-stream") Ĭontent = new MimeContent(new MemoryStream(binar圜ontent)),ĬontentDisposition = new ContentDisposition Harassment is any behavior intended to disturb or upset a person or group of people. If (!ContentType.TryParse(MimeTypes.GetMimeType(attachmentFileName), out var mimeContentType)) Protected MimePart CreateMimeAttachment(string attachmentFileName, byte binar圜ontent, DateTime cDate, DateTime mDate, DateTime rDate) / A leaf-node MIME part that contains an attachment. / 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. After no one wants to help me, I have to help myself.
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