Mail acceptance failure, BDAT command

The BDAT ESMTP command verb is an alternative to the DATA command. When an SMTP virtual server responds to the EHLO keyword with CHUNKING, the SMTP server indicates that it supports the BDAT command and will accept messages in chunks.

To resolve this error, check the messaging environment for issues or configurations that might be blocking the BDAT command verb such as:

  • Transient network outages
  • SMTP proxies
  • Firewalls
  • Applications

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