My server sends emails to a specific email address every day

I noticed that in my main.cf by default I have:

inet_protocols = all

it seems that it causes the problem with gmail that complaints about

connect to gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25: Network is unreachable

is there someone who can explain what is happening here please?

switching to ipv6 the " Network is unreachable" problem but my server still sending email to that address, can't understand why.

any idea?

from the maillog I see this:

Oct 26 23:31:14 netstar postfix/smtp[8198]: CBD7B40E4: to=, relay=gmail-smtp-in.l.google.com[2607:f8b0:4002:c01::1a]:25, delay=0.65, delays=0.04/0.02/0.09/0.51, dsn=2.0.0, status=sent (250 2.0.0 OK 1351287069 c64si2594695yhh.109)

is there a way to log what process or who sent this email?

grep CBD7B40E4 maillog

@hoopycat:

grep CBD7B40E4 maillog

message from APACHE, why apache send this email?

Sounds like it's coming from a website do you have any PHP sites that send email?

@obs:

Sounds like it's coming from a website do you have any PHP sites that send email?

Yes but this website sends email in a protected way very very stringe.

In any case can't be that PHP code since that code forward every email sent to my mailbox.

You could try adding this to your main.cf:

always_bcc = myaddress@example.com

That will cause Postfix to BCC all mail to that address, which could help you figure out what this message is about.

Or he could just have the client that is complaining about the email send him a copy of the full message source.

I have just solved, a dummy customer put his username and password on a forum to try other people

generating a new activation code.

Stupid idiot, obviously my server denied the request and resent the wrong activation email code.

I will not stop this, I'm glad that he will receive every wrong activation msg xD