Receiving but unable to send email

I can receive emails fine but when sending i get a bounce back now almost instantly. When this started i could check the Mail Queue manager and see the emails i attempted to send when clicking deliver selected i would receive the error:

Spool file is locked (another process is handling this message)

Doe anybody have any suggestions on fixing this issue? I have googled tirelessly but a lot of the problem were not exactly the same as mine so i didn't want to apply a fix which may cause more problems down the line.

Everything was working perfectly this seams to have happened out of no where.

 

The bounce back error is,

Code:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

name@domain.com
retry time not reached for any host after a long failure period
Reporting-MTA: dns; server.domain.com

Action: failed
Final-Recipient: rfc822;name@domain.com
Status: 5.0.0

From: Name<name@domain.com>
Date: 6 December 2015 at 12:09:31 GMT
To: name@domain.com

Although it says long failure period this happens instantly.

Please find below the result of issuing: cat /var/log/exim_mainlog | grep message-ID
Hopefully this is what you need please bare with me I'm a linux noob and still learning.


2015-12-06 11:06:18 1a5bpK-0004aS-RA User 0 set for local_delivery transport is on the never_users list
2015-12-06 11:06:18 1a5bpK-0004aS-RA == root@servername.domain.com R=localuser T=local_delivery defer (-29): User 0 set for local_delivery transport is on the never_users list
2015-12-06 11:06:18 1a5bpK-0004aS-RA ** root@servername.domain.com: retry timeout exceeded
2015-12-06 11:06:18 cwd=/var/spool/exim 7 args: /usr/sbin/exim -t -oem -oi -f <> -E1a5bpK-0004aS-RA
2015-12-06 11:06:19 1a5bpK-0004bD-UG <= <> R=1a5bpK-0004aS-RA U=mailnull P=local S=1912 T="Mail delivery failed: returning message to sender" for root@servername.domain.com
2015-12-06 11:06:19 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1a5bpK-0004bD-UG
2015-12-06 11:06:19 1a5bpK-0004bD-UG User 0 set for local_delivery transport is on the never_users list
2015-12-06 11:06:19 1a5bpK-0004bD-UG == root@servername.domain.com R=localuser T=local_delivery defer (-29): User 0 set for local_delivery transport is on the never_users list
2015-12-06 11:06:19 1a5bpK-0004bD-UG ** root@servername.domain.com: retry timeout exceeded
2015-12-06 11:06:19 1a5bpK-0004aS-RA Completed
2015-12-06 11:06:19 1a5bpK-0004bD-UG root@servername.domain.com: error ignored
2015-12-06 11:06:19 1a5bpK-0004bD-UG Completed
2015-12-06 11:06:35 1a5bgS-0004TS-3s H=mx3.hotmail.com [207.46.8.167] Connection timed out
2015-12-06 11:06:40 SMTP connection from [222.222.22.222:50183 (TCP/IP connection count = 1)
2015-12-06 11:06:41 1a5bph-0004bS-2H <= username@domain.com H=bcdd5cdf.provider.com ([111.111.1.11]) [222.222.22.222:50183 P=esmtpsa X=TLSv1:DHE-RSA-AES256-SHA:256 CV=no A=dovecot_plain:username@domain.com S=651 id=3FAE8D3E-C011-4C3E-8FF6-B361488AD4E7@domain.com T="Test" for username@msn.com
2015-12-06 11:06:41 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1a5bph-0004bS-2H
2015-12-06 11:06:41 1a5bph-0004bS-2H SMTP connection outbound 1449418001 1a5bph-0004bS-2H domain.com username@msn.com
2015-12-06 11:06:41 1a5bph-0004bS-2H ** username@msn.com R=dkim_lookuphost T=dkim_remote_smtp: retry time not reached for any host after a long failure period
2015-12-06 11:06:41 cwd=/var/spool/exim 7 args: /usr/sbin/exim -t -oem -oi -f <> -E1a5bph-0004bS-2H
2015-12-06 11:06:41 1a5bph-0004bb-9L <= <> R=1a5bph-0004bS-2H U=mailnull P=local S=1950 T="Mail delivery failed: returning message to sender" for username@domain.com
2015-12-06 11:06:41 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1a5bph-0004bb-9L
2015-12-06 11:06:41 1a5bph-0004bS-2H Completed
2015-12-06 11:06:41 1a5bph-0004bb-9L => username <username@domain.com> R=virtual_user T=virtual_userdelivery
2015-12-06 11:06:41 1a5bph-0004bb-9L Completed

 

I get the result,

220 SNT004-MC1F54.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at default.asp.
451 Timeout waiting for client input

Connection closed by foreign host.

Does this mean i have been marked as spam!?

Thanks for the help Michael

 

If this is the case I'm pretty sure intact 100% sure this wasn't my doing how do i find out how this came about or even if its still happening!?

Thanks again Jamie

 

I have just checked my IPs and server domain and IPS on mxtoolbox and not on any lists

 

Sorry should have done some research first it seams this is the normal outcome? So whats going wrong?

 

All email messages are still failing i have tried multiple domains and nothing is sending the only difference now is i am not receiving bounce backs.

 

After seeing the log using

# /var/log/exim_mainlog

I can see retry timeout exceeded returning message to sender. And also i can see the error Excessive resource usage: from my root @ domain account what would be the cause of this?

I should of pointed out earlier but will point out now. All internal emails are fine i receive all alerts etc sent server side.