how to correct a SMTP banner and mx record difference?
I have inherited a 2003 exhcnage server on 2003 domain controllers. the smtp banner being sent from the exchange server has its original server name appended but the mx record is using another name.
IE, smtp banner: servername.domain.com mx record: email.domain.com
99% of the time this is not an issue however, i have one domain we cannot send email to and i think this may be the cause.
We are running a barracuda in front of the email server. I am looking for the best and cleanest way to correct this issue. When i tried to change the banner on the email server it seemed to upset the barracuda and was no longer able to receive email.
can i add another mx record for the same server just with a higher priority? would this cause a problem or is it not permitted to have two mx records pointing to the same ip address?
IE, smtp banner: servername.domain.com mx record: email.domain.com
99% of the time this is not an issue however, i have one domain we cannot send email to and i think this may be the cause.
We are running a barracuda in front of the email server. I am looking for the best and cleanest way to correct this issue. When i tried to change the banner on the email server it seemed to upset the barracuda and was no longer able to receive email.
can i add another mx record for the same server just with a higher priority? would this cause a problem or is it not permitted to have two mx records pointing to the same ip address?
Hello,
The hostname used in the SMTP banner does not need to match the MX record and would not cause any issues if it doesn't. Are you sending email out through the Barracuda or does it go directly out through Exchange? All you need to make sure is that whatever server you have configured to send out mail has an A record that matches the banner and a PTR record that resolves the public IP to the A record.
JJ
The hostname used in the SMTP banner does not need to match the MX record and would not cause any issues if it doesn't. Are you sending email out through the Barracuda or does it go directly out through Exchange? All you need to make sure is that whatever server you have configured to send out mail has an A record that matches the banner and a PTR record that resolves the public IP to the A record.
JJ
JJ
afraid it can make a difference I have seen some systems do a check in the SMTP banner and if they don't match the mail is rejected.
afraid it can make a difference I have seen some systems do a check in the SMTP banner and if they don't match the mail is rejected.
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the issue with the mail was indeed on the client side.
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