Thread: Best way to host multiple mail servers of one server without being blacklisted?

Hi All,

Email always gives me a headache. My company owns a webserver which we are using to host our clients e-mails and websites. Currently we have about 30 clients being hosted off the same server, with only 3 using hosted e-mail. Recently we got blacklisted and this has caused some problems.

Can anyone advise me of the best way to host multiple email domains off of just 1 server, would I need a static ip address per email domain with it's own reverse dns? Does the reverse dns need to match the email server domain? (e.g. Email server reply to helo with mail.domain.com, mx = mail.domain.com and reverse dns = mail.domain.com) Can the server be set up as a smart host? and if so how do I configure the reverse dns for this?

I have also just realised that we cannot email AOL - any message sent from the server/website/email account does not make it through, however replying to an AOL initiated email will be delivered. Any ideas anyone?

Thanks in advance

You probably got blacklisted because your email server(s) were open for anonymous relay. Fix that and contact the black listing company for a re-test.

Otherwise I see no problems hosting any number of email servers on the same IP address. Just make them secure.