hello everyone
i have a mail server configured Sendmail and i've DNS and rDNS and everything is OK, since a while when one of my users tries to send mail to visa it can't reach the destination and no return mail and they dont recieve it in their spam folders , i want if anyone has any idea to help me ...
thank you

What's your logs indicate if anything?

this is what appears in my logs
delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32604, dsn=2.0.0, stat=Sent

Can you send to your own domain?

yes i can and i send to many domains, but there are two domains dont accept me , one return and the other doesn't return ,

by the way when i send to yahoo it go to spam forlder

Okay, that makes more sense then. I was under the impression it was everything outside blocking your emails.

Yahoo makes sense in blocking emails or sending to spam. They are big on using Domain Keys, they started it actually. So unless you are a large ISP, well known domain and aren't using domain keys, it's probably just going to go straight to the spam folder.

What's the other domain by chance? Does it return anything?

I have the same problem

Look in the logs. Eventually, you'll get a notification stating that your server is suspected of being a spamming computer, then it will tell you what site to go visit to take your DNS/IP off the blacklist. Of course, it will warn you about the fact that if you are suspected of spamming later, you will be "notified".

Try sending a bunch of emails to a yahoo account till it tells you the above message.

The log entry posted by the OP indicates that mail was successfully sent (DNS code 2.0.0. and hence accepted by the remote MTA). The remote MTA can now either BOUNCE the message (and you will have log entries to that affect), or should deliver it to the user. For very high scoring spam, DISCARD can be performed, but that is generally discouraged.

If the mail ends up in a spam folder, then header examination will yield clues as why the message was categorized as spam.

am not a big known domain, it is a simple domain name we created to use it is our small company and now we can send to all we're not blacked in any site but our mails go directly to the spam , we have dns and rdns ,
anyway what should we do to be a "known" domain and mail goes directly to the inbox??


thnx to all

Which domains categorize your mail as spam, and place it in user's spam folders?

Have you been able to examine the mail headers of such mail ?

yahoo
hotmail
visa
bnpparis
these domains classes my mails as spams

VISA, like most major corporations are using an e-mail security gateway appliance to filter incoming mail.

The product they're using can put suspected spam in a quarantine folder on the appliance, or it might just discard the message entirely. When I installed it several years ago, their security group (not their e-mail group) was responsible for running it. If you manage to get in contact with the VISA security group, they might be willing to check what is happening to your messages.

I can almost guarantee you that your messages are being blocked because you come from an IP block that is shared with spammers or computers that have been compromised and are sending spam. In that case, there's very little chance that anyone will make an exception to receive mail from your IP. Your only solution is to move your mail server to some IP space that has better reputation, which means pay more money and have it hosted in a data center with a reputable provider.

By the way, the section of your sendmail log you posted is only sendmail accepting the message from your internal user, that's not sendmail delivering it to the VISA server.

If you want more information on whether your domain is configured properly, you can send me an e-mail with the subject EMAIL TEST to foo AT smtps DOT net. You should also post what IP address your mail comes from, because it's pretty likely it will be blocked by IP reputation and I'll have to put an exception in for that.

another reason that domains may be blocking you is because maybe you don't have reverse lookup configured on your DNS?

just thinking out loud, but I know for a fact that this can be checked as well and based upon that you might be blocked.

If you have configured reverse lookups then I think the guys above me have more of a clue

thank you so much !

i think what chort says is the really truth , i'll think of what to do ...

even if this is so hard for me ...

thnx