Winsock error code: 10051, Win32 error code: 10051' > 421 4.2.1 Unable to connect -> SocketError: Failed to connect. You'll be notified if the message can't be delivered by that time.ĭiagnostic information for administrators: The server will keep trying to deliver this message for the next 1 days, 19 hours and 52 minutes. Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.ĭelivery is delayed to these recipients or groups: If the response is helpful, please click " Accept Answer" and upvote it. If you are using hybrid, delete all connector from Exchange online, remove send connector from Exchange on-premises, then rerun HCW to recreate them.If you are using Exchange on-premises, delete/disable all send connectors, then recreate a new with this article.If you are using Exchange online, just delete/disable all connectors on Exchange online.Release Notes Updates: official site does not provide any info about changes in this version Supported Operation Systems macOS 10. If you organization cannot send emails to other mail servers, you can take steps below to solved this issue: Mellel is the leading word processor for macOS and has been widely considered the industry standard since its inception. Mellel is a powerful word processor that comes with an Outline tool designed to help you manage your document in an efficient manner. If this mailbox could send emails to other mail servers, it means this issue related with the MX record for target mail server, you need to contact target mail server administrator. So, I would suggest you provide a screenshot about the information in that NDR(remove domain name from it), it will help us to narrow down this issue. Mellel is strong, stable and reliable, and is the ideal companion for working on documents that are long and complex, short and simple, or anything in between. If there exist such issue, it will effect all mailboxes rather than only on mailbox. Mellel is a word processor designed from the ground up to be the ultimate writing tool for academics, technical writers, scholars and students.
The "554 5.4.0" error is related with too many hops.
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