601 Attempted to send the message to the following ip's

I receiving the below error while sending emails to one domain.
Anybody can suggest any idea. 


Could not deliver message to the following recipient(s):

Failed Recipient: user@recipient.com

Reason: Remote host said: 601 Attempted to send the message to the following ip's:

         xxx.xx.xx.xxx (ip address)

Bruce Barnes Replied

1/12/2015 at 6:22 AM

I have a KB on this topic, called, "E-Mail Delivery Error Codes" at: https://portal.chicagonettech.com/kb/a115/e-mail-delivery-error-codes.aspx

a "601" error is an "other media error"

Here's a complete list of delivery codes:

Here is a complete list of email delivery error codes.

These delivery codes are based on the Extended SMTP (ESMTP) standards, where X can be 4 or 5, depending on the error type (Persistent Transient or Permanent):

X.1.0 Other address status
X.1.1 Bad destination mailbox address
X.2.0 Bad destination system address
X.1.3 Bad destination mailbox address syntax
X.1.4 Destination mailbox address ambiguous
X.1.5 Destination mailbox address valid
X.1.6 Mailbox has moved
X.1.7 Bad sender's mailbox address syntax
X.1.8 Bad sender's system address
X.2.0 Other or undefined mailbox status
X.2.1 Mailbox disabled, not accepting messages
X.2.2 Mailbox full
X.2.3 Message length exceeds administrative limit.
X.2.4 Mailing list expansion problem
X.3.0 Other or undefined mail system status
X.3.1 Mail system full
X.3.2 System not accepting network messages
X.3.3 System not capable of selected features
X.3.4 Message too big for system
X.4.0 Other or undefined network or routing status
X.4.1 No answer from host
X.4.2 Bad connection
X.4.3 Routing server failure
X.4.4 Unable to route
X.4.5 Network congestion
X.4.6 Routing loop detected
X.4.7 Delivery time expired
X.4.7.11 Encryption required for connection
X.4.7.14 Potential security issue for sender
X.4.7.9 Security issue with user authentication
X.5.0 Other or undefined protocol status
X.5.1 Invalid command
X.5.2 Syntax error
X.5.3 Too many recipients
X.5.4 Invalid command arguments
X.5.5 Wrong protocol version
X.6.0 Other or undefined media error
X.6.1 Media not supported
X.6.2 Conversion required and prohibited
X.6.3 Conversion required but not supported
X.6.4 Conversion with loss performed
X.6.5 Conversion failed
X.7.0 Other or undefined security status
X.7.1 Delivery not authorized, message refused
X.7.2 Mailing list expansion prohibited
X.7.3 Security conversion required but not possible
X.7.4 Security features not supported
X.7.5 Cryptographic failure
X.7.6 Cryptographic algorithm not supported
X.7.7 Message integrity failure

Read the complete article at: https://portal.chicagonettech.com/kb/a115/e-mail-delivery-error-codes.aspx

Bruce Barnes ChicagoNetTech Inc brucecnt@comcast.net Phonr: (773) 491-9019 Phone: (224) 444-0169 E-Mail and DNS Security Specialist Network Security Specialist Customer Service Portal: https://portal.chicagonettech.com Website: https://www.ChicagoNetTech.com Security Blog: http://networkbastion.blogspot.com/ Web and E-Mail Hosting, E-Mail Security and Consulting

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