LAMP with Postfix says status=sent but no mails are delivered
So I setup a fresh droplet using DigitalOcean's "LAMP on Ubuntu 16.04" preconfigured thingy. I also followed some tuts, for example this one.
Everything works just fine, except the whole e-mail stuff. I want to host a standard Wordpress site on this droplet and of course also need to send mails (contact forms and stuff). But I can't for the life of me get the whole postfix email thing to work.
Domain: "foobar.at" (A-record set to droplet IP, MX record I left as standard from my DNS provider - do I need to change the MX record maybe??)
droplet hostname: "foobar" (not "foobar.at" or "foobar-at")
Distro: Ubuntu 16.04 LTS
Standard LAMP Stack
UFW Firewall with ports 25 and 587 open
When I try to send a mail via
echo "This is the body of the email" | mail -s "This is the subject line" your_email_address
or just using a simple php script I call via the browser, the following logs appear in my
Dec 22 11:17:06 foobar postfix/qmgr: EC576D82A: from=<email@example.com>, size=383, nrcpt=1 (queue active) Dec 22 11:17:07 foobar postfix/smtp: EC576D82A: to=<firstname.lastname@example.org>, relay=gmail-smtp-in.l.google.com[22.214.171.124]:25, delay=0.52, delays=0.01/0.01/0.34/0.17, dsn=2.0.0, status=sent (250 2.0.0 OK 1482405427 em6si31461231wjb.114 - gsmtp) Dec 22 11:17:07 foobar postfix/qmgr: EC576D82A: removed
So if I understand this correctly it says
status=sent (250 2.0.0 OK) which sounds good to me. But I do not receive any emails ... not even in the spam folder of gmail!
What am I doing wrong? What am I missing here?
Maybe something with my domain records is wrong?
Thanks a bunch in advance,