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?