Nightly automated emailed invoices error

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Posted on by merlin803

My company has been using AX 2009 for several years now and just recently moved to a O365 email system (from an older in house Exchange system).

We have our invoices emailed from AX to our customers nightly and after we switched to the O365 system, we started getting back email failures from some of our customers (error code 5.6.11 - related to "A bare line feed character " issue).

We can send emailed invoices fine if we manually choose an invoice and email in AX vs using the automated batch job (I believe this is because manually sending them uses the individual user's email settings on that server vs the automated job that uses the SMTP settings in AX).

Has anyone ran into this or does anyone have any suggestions for resolving it?

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merlin803 12 on at

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RE: Nightly automated emailed invoices error

Thanks for that, I did check that out. Besides trying to edit the actual email message associated with the automated emails to make sure there were no special characters and ending the message to end in both a return carriage and trying without one (neither helped), the other solutions seem to be having the recipient make changes to their email system (we have reached out to some affected customers but so far none have been willing to help so that is likely not going to be a solution for us).
André Arnaud de Cal... 294,261 Super User 2025 Season 1 on at

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RE: Nightly automated emailed invoices error

Hi Merlin803,

You might want to check the next document: Fix email delivery issues for error code 550 5.6.11 in Exchange Online | Microsoft Docs