Looks like there are some issues sending to legacy Time Warner (xx.rr.com) mailboxes from Office 365. A client of ours (Columbia, SC) was having this issue, and it looks like it's affecting other areas. See this thread, specifically page 2: http://www.dslreports.com/forum/r31626162-TWC-Spectrum-TWC-SMTP-Server-Issue... Casey Crowe IT Systems Engineer Palmetto Computer Consulting Office: (803) 832-2653 Cell: (803) 386-9302 www.palmettocc.net<http://www.palmettocc.net/> [PCC_logo]