<*******@*****.in>: 550: References header is too long. mail not going
Sat, Jul 24 at 1:21 PM
Sorry, we were unable to deliver your message to the following address.
550: References header is too long
mail not going. please fix their problem
When you get mail from a “MAILER-DAEMON” or a “Mail Delivery Subsystem” with a subject similar to “Failed Delivery,” this means that a message you sent was undeliverable and has been bounced back to you. These messages are produced automatically and usually include a reason for the delivery failure. More info here: https://help.yahoo.com/kb/email-failed-delivery-message-sln3275.html