Can i configure mail-in-a-box and php site in one linode?

I don’t see why not… especially if the volume of traffic to/from each is relatively low. That’s what I do (my Linode is not a nanode however). Mail servers & web servers are famously io-bound…not compute-bound.

However, you need to make sure that you implement all of the email stuff that is going to be required by all of your correspondents’ providers: rDNS, SPF, DKIM, DMARC, etc. Requirements and guides for doing all this are outlined in other threads in this forum.

— sw

Hello @stevewi

Thanks for the reply, but only issue i can see is how to access my website admin and mail-in-a-box admin?

I have 8gb ram linode, and have php with with admin. Also if i install mail server using THIS instruction, looks like it also acccesible via xyz.com/admin url, Do you think it will be conflict with site admin and mail admin?

No. This is why God invented URLs… Your website admin & mail admin don’t have to live under the same physical directory (in fact, they shouldn’t!). For example, all of my mail config lives in /srv/mail & all of my web stuff lives in /srv/www.

Granted I don’t have a web admin for postfix(1)/dovecot(1) (I don’t know of one…let alone one that would give me the kind of control I need over all my custom spam defenses), but I have used roundcube in the past. It lived under /srv/mail/roundcube.

You make all this work with web server configuration…as God intended it to be.

— sw