kozdo
asked on
Open relay check and email delivery issue.
Hi,
We run a webhosting server - WHM, Cpanel but some other servers don`t accept emails form our server. We are not blacklisted and the reverse DNS is ok. But we may have an open relay. But we`re not sure.
1. How can we check it to be sure and how can we manage to NOT to have an open relay?
2. What other factors can cause that email from our mail server are not delivered to some destinations?
3. What can we do to have it in 100% state that it will always work well and every email will be delivered.
Thank you very much for help. Our server Ip is 77.240.176.70.
We run a webhosting server - WHM, Cpanel but some other servers don`t accept emails form our server. We are not blacklisted and the reverse DNS is ok. But we may have an open relay. But we`re not sure.
1. How can we check it to be sure and how can we manage to NOT to have an open relay?
2. What other factors can cause that email from our mail server are not delivered to some destinations?
3. What can we do to have it in 100% state that it will always work well and every email will be delivered.
Thank you very much for help. Our server Ip is 77.240.176.70.
You don't appear to be an open relay. Are you getting an NDR from the domains you can't send to?
JJ
JJ
ASKER
hi,
no i;m not getting anything, when i send email, it just disappears. And Yahoo places all emails from our server to the spam folder.
no i;m not getting anything, when i send email, it just disappears. And Yahoo places all emails from our server to the spam folder.
ASKER
Maybe we still miss something in configuration in WHM.
I'm not familiar with WHM. Are there any logs that you can track email to see if it actually left your server? Since you aren't receiving any NDRs and your mail is ending up in the spam folder in Yahoo! mailboxes, I suspect your mail is getting caught up in spam filters.
You can try this as a test - from your mail server, initiate a telnet session to the mail server of one of the recipients who is not receiving email from you. Send mail through the telnet session. It will tell you id the recipient's server accepted the message or you may get an error message. If the message is accespted, verify the recipient received it. If they did not, the message is being filtered at the recipient's end.
http://www.yuki-onna.co.uk/email/smtp.html
JJ
You can try this as a test - from your mail server, initiate a telnet session to the mail server of one of the recipients who is not receiving email from you. Send mail through the telnet session. It will tell you id the recipient's server accepted the message or you may get an error message. If the message is accespted, verify the recipient received it. If they did not, the message is being filtered at the recipient's end.
http://www.yuki-onna.co.uk/email/smtp.html
JJ
ASKER
Yes, it is being filtered at the recipient's end. But we don;t know why and how can we prevent this?
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ASKER
ah, ok, thank you.
You can use this tool to check if you are an open relay - http://www.checkor.com/
JJ