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 &. #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.ĥ50 5.6.11 SMTPSEND.GoDaddy recently updated their mail servers to outlook.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. Your message contains invalid characters (bare line feed characters) which the email servers at _ don't support. What have they changed?Īny ideas? Every microsoft article I find is as useful as a chocolate teapot and suggests I go around updating all my customer's email server for them. I have tried sending through the web client and it works. I've tried changing to Outlook 2013 and get the same error. #BARELINEFEEDSAREILLEGAL BASEELEMENTS WINDOWS#Yes everything is up to date, Windows 10.īoth are POP3. This is on 2 computers at the same time so something fucky has happened somewhere else. I've tried the DWORD fix, changed the international settings to UTF8, taken off the line break checkbox, and it works 1/10 times. Everything bounces back with the error below. We've been using Outlook 2007 for like 10 years and yesterday it shit it's pants and now refuses to send emails.
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