Can't send emails with Postfix

Hello,
I got hacked and my server started to send spam emails as shown here
https://www.howtoforge.com/community/threads/postfix-spam-attack.83152/
I fixed it and started Postfix again but I get a status bounced

Code:

Nov  8 07:51:21 nsXXX95 postfix/error[20755]: 94CE3160056: to=<[email protected]>, relay=none, delay=0.08, delays=0.04/0.02/0/0.02, dsn=5.0.0, status=bounced (gmail.com)

How can I get more log details and what do you suggest to do?
Thanks
Note: I changed the email in here for obvious reasons but it is a valid email.

 

Is your servers IP-address blacklisted? Check for example with mxtoolbox.com.
Maybe

Code:

grep 94CE3160056 /var/log/mail.log

shows more info related to that bounced e-mail?

 

I checked with Blacklist check with the link you gave me and all green, but not sure it checks gmail.

Code:

root@nsXXX95:~# grep 94CE3160056 /var/log/mail.log
Nov  8 07:51:21 nsXXX95 postfix/pickup[18979]: 94CE3160056: uid=0 from=<[email protected]>
Nov  8 07:51:21 nsXXX95 postfix/cleanup[20753]: 94CE3160056: message-id=<[email protected]>
Nov  8 07:51:21 nsXXX95 postfix/qmgr[6794]: 94CE3160056: from=<[email protected]>, size=388, nrcpt=1 (queue active)
Nov  8 07:51:21 nsXXX95 postfix/error[20755]: 94CE3160056: to=<[email protected]>, relay=none, delay=0.08, delays=0.04/0.02/0/0.02, dsn=5.0.0, status=bounced (gmail.com)
Nov  8 07:51:21 nsXXX95 postfix/bounce[20756]: 94CE3160056: sender non-delivery notification: A2C861630A1
Nov  8 07:51:21 nsXXX95 postfix/qmgr[6794]: 94CE3160056: removed

 

Check what you can see from

Code:

# postcat /var/spool/postfix/deferred/A/A2C861630A1

if that e-mail still is in mail queue.
Otherwise, check what happened to that non-delivery notification:

Code:

grep  A2C861630A1 /var/log/mail.log

It should got to some mailbox.

 

Here it is:

Code:

root@nsXXX95:/tmp/logs# postcat /var/spool/postfix/deferred/A/A2C861630A1
postcat: fatal: open /var/spool/postfix/deferred/A/A2C861630A1: No such file or directory

Code:

root@nsXXX95:/tmp/logs# grep  A2C861630A1 /var/log/mail.log
Nov  8 07:51:21 nsXXX95 postfix/cleanup[20753]: A2C861630A1: message-id=<[email protected]>
Nov  8 07:51:21 nsXXX95 postfix/bounce[20756]: 94CE3160056: sender non-delivery notification: A2C861630A1
Nov  8 07:51:21 nsXXX95 postfix/qmgr[6794]: A2C861630A1: from=<>, size=2236, nrcpt=1 (queue active)
Nov  8 07:51:21 nsXXX95 postfix/local[20757]: A2C861630A1: to=<[email protected]>, relay=local, delay=0.05, delays=0/0.03/0/0.01, dsn=2.0.0, status=sent (delivered to command: procmail -a "$EXTENSION")
Nov  8 07:51:21 nsXXX95 postfix/qmgr[6794]: A2C861630A1: removed

 

How to check if my IP is blacklisted by Google?

 

I have no idea. Google, like other big e-mail providers, seem to keep secret what blacklists they use and for what reason mails are put into SPAM-folder.
Have you checked all log files? See ls -lht /var/log | head for the latest after you try that file attaching.
Have you read the mailbox for [email protected]-5-196-73.eu ?

 

Read: https://support.google.com/mail/answer/81126
Follow: https://support.google.com/mail/troubleshooter/2696779
Sign up at: https://postmaster.google.com

Usually, you should get a more detailed error message from gmail in your logs.

 

I am not attaching a file, just trying a

Code:

echo "Test mail from postfix" | mail -s "Test Postfix" [email protected]

I type mail and it says

Code:

No mail for root

 

I just filled this form, I dunno if it is the good one
https://support.google.com/mail/contact/bulk_send_new?rd=1

 

Still can't send emails from the server.
Any ideas?

 

OK, I made it work.
Just purged everything postfix and mailutils and reinstalled.
It now works...