Many many thanks to writer of this greate how to, it is really helpfull and it just works

I am new to this forum so let me be part of this please

I followed this how to and got my zimbra running without any major issue. I cannot figure out where this info should go  /etc/hosts  or /etc/resolv.conf or somewhere else

[...]
mail.example.com.        A    1.2.3.4
mail.example.com.        MX 0 mail.example.com.
example.com.             MX 0 mail.example.com.
[...]

so followed rest and it still worked very nice but I was not able to browse by domain mail.example.com and that is why I could got any email or reply I was successfull in sending mails, but I used IP instead and that worked. I am really thankfull to writer and asking for little help to clear where this stuff stated above suppose to go and if possible give me exact files contents which will be greate help. Thank you in advance

ryazkhan@gmail.com