Unsolicited Content, E-mail send but not received

[ava]

Hi,

Some times, we send some e-mails and the delivery address email not receive this one and after several hours we get message as below :

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[<02>] The reason of the delivery failure was:

552 5.2.0 DlSm1b03x2AdYih02lSoaa automated process detected unsolicited
content
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Thanks for your feed-back.
bst rgds

[Sob]

What about spam filter at recipicient's server, that thinks your message is spam and refuses to accept it?

[ava]

where we can find spam filter recipient ?????

[Sob]

What I ment was:

- you send an e-mail to someone through your server
- your server tries to deliver it to target server
- target server runs some spam test on it and comes to conclusion that your mail is spam
- for some reason the target server returns code 552 which means temporary error, instead of permanently rejecting it - it explains the several hours delay
- your server tries it few more times until it decides that the mail can't be delivered
- your server sends you a notification message about it

If I'm correct, you should use some other way to communicate with that someone and tell him/her to fix the spam filter or add you to whitelist or something like that.