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Old 27th May 2010, 09:53
djmixx07 djmixx07 is offline
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Default Undelivered Mail Returned to Sender

I've been getting THOUSANDS of emails that says "Undelivered Mail Returned to Sender". Last weekend I got like 24k+ of mails of these things. Most of them has nothing inside it when I open it, it doesn't even have details on it's subject headers. I tried to do some research for prevention of spam emails for my Postfix's, but I still get these emails. Besides this, I also get emails mostly from a brazilian domain..some of them always mention "Bradesco" which I don't know what that is. And one last weird thing that happens to my mailbox..when I try to send a test mail to my email, I receive it and it seems to look normal in my inbox.. but when I open it, it's a whole different email which isn't the one I sent to myself.

My mailq also has been always filled with tons of these mails that delays receiving/sending of "real" emails aswell..

I hope you guys can help me on's been a month and it's driving me crazy. I'm kindof a novice when it comes to this, but I'm willing to learn. My email has catchAll enabled because it's a 'postmaster' account. Thanks in advance.

Here's my
myhostname =
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = $mydomain
mydestination = /etc/postfix/local-host-names
relayhost = 
home_mailbox =
mynetworks =,
mailbox_command = 
mailbox_size_limit = 0
message_size_limit = 104857600
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
smtpd_sasl_local_domain = 
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_destination, reject_unauth_pipelining, reject_invalid_hostname, reject_non_fqdn_hostname, reject_rbl_client, reject_rbl_client, reject_rhsbl_sender, check_policy_service inet:, permit
smtpd_tls_auth_only = no
smtp_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
virtual_maps = hash:/etc/postfix/virtusertable
#virtual_alias_maps = hash:/etc/postfix/virtual
mydomain =
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
smtpd_data_restrictions = reject_unauth_pipelining, reject_multi_recipient_bounce, permit
smtpd_helo_restrictions = reject_unknown_helo_hostname
smtpd_sender_restrictions = reject_unknown_address, reject_unknown_sender_domain
maximal_queue_lifetime = 1d
delay_warning_time = 0h
smtpd_helo_required = yes
disable_vrfy_command = yes
DJ Delos Santos
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