We have collected information about Dsn=4 4 2 Status=Deferred Delivery Temporarily Suspended for you. Follow the links to find out details on Dsn=4 4 2 Status=Deferred Delivery Temporarily Suspended.
https://serverfault.com/questions/181487/postfix-delivery-temporarily-suspended-sending-to-google-apps
The text of your log files says "No route to host" -- this could be because your ISP is blocking outgoing smtp traffic, but is not the only reason. (For example, if your linux box has a static route that is no longer valid, you'd get something like the results you are seeing.)
https://forums.centos.org/viewtopic.php?t=57875
May 23, 2016 · Postfix: status=deferred (delivery temporarily suspended: lost connection while receiving the initial server greeting) Issues related to applications and software problems 7 posts • Page 1 of 1
https://www.howtoforge.com/community/threads/postfix-status-deferred-connection-timed-out.18781/
Feb 06, 2009 · PostFix behind router Hi All I have same problem as You "running PostFix Mail Server behind router " I can receive mail from outside but I can`t send them out I read lot of forums and lot web sides I did not found solution for this problem
https://www.esds.co.in/kb/mail-is-deferred-delivery-temporarily-suspended/
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https://serverfault.com/questions/405152/why-is-postfix-trying-to-connect-to-other-machines-smtp-port-25
Most likely they are wrong email addresses or your DNS resolution is failing. Postfix will try to connect to the SMTP server according to the MX record of the ab.xyz.com domain to deliver the email, but if Postfix cannot find a MX record, it will attempt to deliver to the IP of the A record.
https://www.virtualmin.com/node/32537
These forums are locked and archived, but all topics have been migrated to the new forum. You can search for this topic on the new forum: Search for Mail Server not accepting messages: delivery temporarily suspended - Connection refused on the new forum.
https://groups.google.com/d/topic/alt.comp.mail.postfix/VD-__5UQT6Q
Apr 28, 2009 · delays=0.02/0/0/0.01, dsn=4.4.2, status=deferred (delivery temporarily suspended: conversation with extmail.bpbb.bigpond.com[61.9.189.122] timed out while sending message body) This has been happening for a few months now. I can only assume that bigpond is blocking my IP address range, probably in some misguided attempt to stop spam.
https://success.trendmicro.com/solution/1055808-users-encounter-issues-when-sending-mails-to-some-domains
Solution 2. This issue is caused by "fixup protocol smtp" in some Cisco firewalls. The Cisco PIX firewall has a bug when running software older than version 5.2(4) or 6.0(1). The "fixup protocol smtp" feature does not correctly handle the case where the "." and the "CRLF" at the end of the mail are sent in separate packets.
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http://postfix.1071664.n5.nabble.com/lost-connection-with-while-sending-RCPT-TO-td55384.html
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