Well, to host your own Server and have an IP from your provider seems to be a hard job for understanding DNS-Configuration...in my case. Lets face it, my server-adress is xyz.internetserviceteam.com. Thats also my hostname. ISPConfig uses then this as Nameserver 1 and 2...thats correct? resolf.conf shows: nameserver 18.104.22.168 nameserver 22.214.171.124 ...so shouldn't these be in the Nameserver-field? Second, if I use domain xyz.mydomain.de, I put a standard SOA as mydomain.de on my server-ip. That's fine...now, I put in a config, that I wanna be shure is correct: As first A-Record I have automatically mydomain.de. ...so I wouldn't have to add it manually again. Second A-Record I put in mail (.mydomain.de) because I wanna use it for Outlook. And third I put in ns (.mydomain.de) because (and here is my thought...correct or not?) I put ns.mydomain.de as the first nameserver under options (second nameserver is xyz.internetserviceteam.com again). Is this useless? Plesk does this on another server I own... As CNAME I only took www for mydomain.de And last I took mail as MX 10 because this will be used by Outlook, as I said. Please tell me, if I did something wrong or if I could do better/easier with this config. And, please tell me, what options I should use as SPF record now...would I have to add a SPF-Record with mail as Host and put all options on YES or how would I config this the right way with my configuration...? Actually, these DNS-Entries are not for sending mail over phpmailers that use the mailfunction in php, are they? The phpmailer uses localhost and activated e-mail-accounts...so SPF would/would not need an entry for mydomain.de (without host), would it??