Incoming maiflow Stuck. Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Messaging Software › Exchange 2007 / 2010 / 2013 › Incoming maiflow Stuck. This topic contains 3 replies, has 4 voices, and was last updated by Elan Shudnow 12 years, 5 months ago. Viewing 4 posts - 1 through 4 (of 4 total) Author Posts aatishMember Oct 12, 2007 at 3:03 am #128233 Incoming maiflow Stuck. When we try to telnet hub transort on 25 port following error gives: 421 4.3.2 Service not available, closing transmission channel HUB is refusing all incomming mails ……. What are the possible causes for same. tkolberMember Oct 12, 2007 at 6:16 am #284328 Re: Incoming maiflow Stuck. 1. Check the connection with the AD & mailbox role servers 2. Run the EXBPA and search for the problem. netxtMember Oct 12, 2007 at 8:43 am #252731 Re: Incoming maiflow Stuck. Run the following script Test-ServiceHealth Did you cheack the Application logs? Elan ShudnowMember Oct 14, 2007 at 5:16 pm #305587 Re: Incoming maiflow Stuck. Also, look at the Exchange 2007 Toolbox and use the ExTRA tools to troubleshoot mailflow problems. Do you currently see all your mail in the Queue? Do a Netstat -a. Does it show port 25 as listening? Author Posts Viewing 4 posts - 1 through 4 (of 4 total) You must be logged in to reply to this topic.