Hello
Having looked through the forum I can see that we are not alone in having this issue.
As a company we have moved our email to Office365 and when sending emails to several of our customers we are getting bounce backs.
This has only started happening over the last couple of days. The issue is further compounded in that we are contractually obliged to provide information to our customers via email.
if it helps here is the error detail, but I'm sure that you have seen it before!
Error Details
Reported error: 550 5.0.350 Remote server returned an error -> 553 Message filtered. Refer to the Troubleshooting page at;http://www.symanteccloud.com/troubleshooting for more;information. (#5.7.1)
DSN generated by: AM5PR0901MB1425.eurprd09.prod.outlook.com
Remote server: server-16.tower-86.messagelabs.com
Regards
Tyrone