Issue with emails bouncing back

Hi All,

The emails have been working great over the last couple of weeks using virtualmin but today suddenly they have stopped. I get this in my mail log

"Jul 1 13:15:03 server1 postfix/pickup[18805]: 4A7276E093D: uid=0 from= Jul 1 13:15:03 server1 postfix/cleanup[19038]: 4A7276E093D: message-id=20190701131503.4A7276E093D@server1.domain.uk Jul 1 13:15:03 server1 postfix/qmgr[18806]: 4A7276E093D: from=<root@server1>, size=2851, nrcpt=1 (queue active) Jul 1 13:15:03 server1 postfix/smtp[19040]: 4A7276E093D: to=<root@server1>, orig_to=, relay=none, delay=0.13, delays=0.08/0.05/0.01/0, dsn=5.4.6, status=bounced (mail for server1 loops back to myself) Jul 1 13:15:03 server1 postfix/cleanup[19038]: 6B56D6E0945: message-id=20190701131503.6B56D6E0945@server1.domain.uk Jul 1 13:15:03 server1 postfix/bounce[19041]: 4A7276E093D: sender non-delivery notification: 6B56D6E0945 Jul 1 13:15:03 server1 postfix/qmgr[18806]: 6B56D6E0945: from=<>, size=4774, nrcpt=1 (queue active) Jul 1 13:15:03 server1 postfix/qmgr[18806]: 4A7276E093D: removed Jul 1 13:15:03 server1 postfix/smtp[19040]: 6B56D6E0945: to=<root@server1>, relay=none, delay=0.02, delays=0.01/0.01/0.01/0, dsn=5.4.6, status=bounced (mail for server1 loops back to myself) Jul 1 13:15:03 server1 postfix/qmgr[18806]: 6B56D6E0945: removed"

my main.cf is as follows:

See /usr/share/postfix/main.cf.dist for a commented, more complete version Debian specific: Specifying a file name will cause the first line of that file to be used as the name. The Debian default is /etc/mailname. myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no

appending .domain is the MUA's job.

append_dot_mydomain = no

Uncomment the next line to generate "delayed mail" warnings delay_warning_time = 4h

readme_directory = no

See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on fresh installs.

compatibility_level = 2

TLS parameters

smtpd_tls_cert_file = /etc/postfix/postfix.cert.pem smtpd_tls_key_file = /etc/postfix/postfix.key.pem smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for information on enabling SSL in the smtp client.

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination myhostname = server1.domain.uk alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = $myhostname, server1.domain.uk, localhost.domain.uk, domain.uk , localhost relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all inet_protocols = all virtual_alias_maps = hash:/etc/postfix/virtual sender_bcc_maps = hash:/etc/postfix/bcc mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME home_mailbox = Maildir/ smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination smtp_tls_security_level = dane allow_percent_hack = no smtpd_tls_CAfile = /etc/postfix/postfix.ca.pem smtpd_tls_security_level = may milter_default_action = accept milter_protocol = 2

If anyone could shed some light on this that would be good. I do get the correct response when i dig the mx record.