mail error message

cheesewizz · 10-22-2013, 12:57 AM

Hi

I am using postfix installed in centos 6.4 x86_64
i can able to send and receive messages

but im having an issue there are some emails bounce back

1.
<xxxx@xxx.com.au>: host xxx.xxxxx.com.au[x.x.x.x] said: 550
5.1.1 User unknown (in reply to RCPT TO command)

2.
550 5.7.1 Your email messages have been blocked by the recipient OR by
Trend Micro Email Reputation Service. Contact the recipient or his/her
administrator using alternate means to resolve the issue. (in reply to RCPT
TO command)

3. <x@xxx.com.au>: host mail.xxxx.com.au[x.x.x.x] said: 550 sorry, no
mailbox here by that name. (#5.7.17) (in reply to RCPT TO command)

is there anyone who can able to explain.

thanks

cheesewizz · 10-22-2013, 01:02 AM

4.
said: 503 This mail server requires authentication when attempting to send
to a non-local e-mail address. Please check your mail client settings or
contact your administrator to verify that the domain or address is defined
for this server. (in reply to RCPT TO command)

TenTenths · 10-22-2013, 02:48 AM

Trying to send to someone that doesn't have a mailbox, check the e-mail address is valid. See where it has the handy 5.1.1 User unknown which should have been the clue.
The destination mail server thinks your a spammer or the recipient has blacklisted you.
Trying to send to someone that doesn't have a mailbox, check the e-mail address is valid. Oh, another handy 550 sorry, no mailbox here by that name. Did you actually bother to read the messages?
Possibly a misconfigured relay at the other side.

cheesewizz · 10-22-2013, 03:34 AM

Quote:

Originally Posted by TenTenths

Trying to send to someone that doesn't have a mailbox, check the e-mail address is valid. See where it has the handy 5.1.1 User unknown which should have been the clue.
The destination mail server thinks your a spammer or the recipient has blacklisted you.
Trying to send to someone that doesn't have a mailbox, check the e-mail address is valid. Oh, another handy 550 sorry, no mailbox here by that name. Did you actually bother to read the messages?
Possibly a misconfigured relay at the other side.

Thank you