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Q: Why am I getting a Bobo with your canned meat email error message?

  • Unable to send email through outgoing.mit.edu
  • Trying to send authenticated email through outgoing.mit.edu generates the error "554 5.7.1 Bobo with your canned meat?"
    Note: also check the list of mail errors here: Email bounce error messages
  • The mail is rejected by outgoing.mit.edu

Context

  • MIT still operates an authenticated SMTP server on campus for IMAP users and other members of the MIT community needing to send email via SMTP
  • There are some limits in place on this server to prevent intentional or unintentional use of it as a bulk mailing or spam server
  • A rate limit has been placed on outgoing.mit.edu limiting each user to under approximately 1000 recipients per 24 hours. This rate limit is enforced by outgoing.mit.edu.
  • The count is by individual recipient in the header - a single mailing list counts as one recipient regardless of the number of recipients on the list.

Answer

  • If you have a legitimate reason to be sending bulk email, contact accounts@mit.edu and we can work with the network team to adjust the whitelist.
  • If you do not think you are sending enough email to trigger this limit, also contact accounts@mit.edu and we will try to figure out what is causing the block to be triggered. There may be a spammer using your account, or you may have a mail client sending duplicate messages over and over, or some other trouble that should be stopped.

See Also

[What is the maximum number of recipients for email messages using MIT's Exchange system?]
Email bounce error messages

IS&T Contributions

Documentation and information provided by IS&T staff members


Last Modified:

March 18, 2019

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