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https://community.spiceworks.com/topic/111330-warning-could-not-send-message-for-past-4-hours
Warning: Could not send message for past 4 hours. ... resource temporarily unavailable [email protected] deferred- Warning: message still undelivered after 4 hours will keep trying till message is 1 day old" This is what they keep getting back when trying to email anyone here at work. They are able to send other encrypted emails to us fine it ...
https://social.technet.microsoft.com/Forums/en-US/ae32865b-e028-490c-bc63-b7979bd96689/451-441-error-from-certain-domains
451 4.4.1 reply: read error from mail.reciever.com <[email protected]>... deferred: operation timed out with mail.reciever.com warning: message still undelivered after 4 hours will keep trying until message is 5 days old. This message was sent to our customer from the send smtp gateway on out mx records. does anyone have any suggestions? James
https://support.google.com/mail/thread/15238559/how-to-find-out-why-email-sender-is-deferred?hl=en
Deferred Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old How can I find out the source of the problem? As far as I can tell the usual suspects are okay, ie my server should pass spf checks and reverse dns should be okay, but chances are there is something slightly wrong since the change.
https://www.pdl.cmu.edu/mailinglists/ips/mail/msg02662.html
Deferred: A remote host did not respond within the timeout period. with ece.cmu.edu. Warning: message still undelivered after 4 hours Will keep trying until message is 3 days old Reporting-MTA: dns; d12lmsgate.de.ibm.com Arrival-Date: Sat, 30 Dec 2000 17:43:50 +0100 Final-Recipient: RFC822; [email protected] Action: delayed Status: 4.4.1 Remote-MTA: DNS; ece.cmu.edu Last …
http://lkml.iu.edu/hypermail/linux/net/0008.2/0003.html
Deferred: Connection refused by vger.kernel.org. Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old
http://www.geekstogo.com/forum/topic/348964-warning-could-not-send-message-for-past-4-hours-mail-delivery-subsystem-mailer-daemon/
Deferred: 421 4.4.2 Connection timed out. Warning: message still undelivered after 4 hours. Will keep trying until message is 5 days old. I went to google chrome and logged into my personal gmail and yahoo accounts and sent her test emails and she received both of …
http://www.quarterman.org/archive/msg00071.html
Deferred: Connection timed out with chrysalis.org. Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old Message delivered to mailing list quarterman
https://www.experts-exchange.com/questions/27018398/Receiving-message-delayed-email-when-sending-email-Deferred-Broken-Pipe.html
Deferred: Broken pipe Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old Reporting-MTA: dns; mail153c38.carrierzone.com Received-From-MTA: DNS; localhost Arrival-Date: Tue, 3 May 2011 15:45:20 -0400 Final-Recipient: RFC822; [email protected] Action: delayed Status: 4.4.2 Remote-MTA: DNS; [207.217 ...
https://archives.seul.org/computerbank/Mar-1999/msg00013.html
Deferred: Connection timed out with mail.aceonline.com.au. >Warning: message still undelivered after 4 hours >Will keep trying until message is 5 days old > Warning Could not process part with given Content-Type: message/delivery-status-- BEGIN included message. To: "computerbank" <[email protected]>
https://csguide.cs.princeton.edu/email/errors
The other reason could be that someone is infected with a virus/spyware and is sending out messages based on the addresses stored in a personal address book. Solution: In most cases you can safely ignore these messages.
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