I have filed to flight plans with Skydemon theses days and it worked perfectly.
But I only get an email back from a Skydemon Server that the flight plan was submitted to officials.
I never get an answer that the flight plan is accepted correctly by DFS or someone else.
At my first attempt, I called DFS to make sure they have my flightplan - they had. For the second time (submitted in Switzerland) I took the risk, but anything was fine.
Filing a flight plan from the DFS-AIS Website, I can get an SMS as a receipt - good to know.
Can Skydemon do this also (or ask DFS to send it) ? My phone number is always in the submitted data.
Or can you link Skdemon to my DFS-account? I think other countries have similar Websites.

This is the Content of the Email:

(FPL-Dxxxx-VG
-yyyy/L-OV/S
-LS**0950
-N0099VFR DCT 4613N00902E DCT 4618N00900E DCT 4631N00841E DCT
4633N00834E DCT 4643N00837E DCT 4653N00838E DCT 4658N00824E DCT
4706N00818E DCT 4740N00800E DCT
-EDTF0129
-EET/EDGG0115 RMK/PILOT John Doe +49123456789, CREATED BY
SKYDEMON, SUPP INFO RQS KBLIHAEX DOF/160914)

Addresses: LSZLZPZX

See also all the DCT xxx. At least I had 2 Airfields with ICAO-Code  as waypoints

There is no such things as an ACK/REJ in VFR flightplans. Some countries may have implemented their own local rules which differ from this, but we generally follow only the international standard. Item 19 is omitted from initial flightplan transmission, again because you are not supposed to transmit it according to the international standard. Many countries DO respond to the flightplans we send, and these responses are sent on by us via email.

If your local authority provides a mean to file flightplans which works for you, I would encourage you to use it. We make no money from flightplan filing and the fragmented nature of European VFR flightplan filing tends to give rise to threads like this. We cannot please everyone when the rules vary from country to country as they do.

I can't believe that you don' want make money with filing FPLs. AFAIK you sell credits for this service! That is okay!
It is just a suggestion to make a good working program work even better. It looks pretty easy to append something more or less non-standard after the standard string. You definitely don't have to pay hundreds of programming hours to add this feature and make more customers happy.

What is the problem ?
Please call DFS to remove their SMS-service.
DFS is more or less government, so they do not have to make their customers happy.
And of course skydemon itself must be closed/removed as it may motivate low-brainers or non-brainers to fly away from their home-airfield.
Get rid of seat-belts, airbags and anything else in cars as that stuff may force over-population.

What exactly is the flightplan portion you are asking us to include, for flightplans transmitted to German addresses?

I am definitely not a specialist for the Standards for flightplan filing.
I only see that the whole flightplan  is simply a string. See my own example and! Shifu's example. BTW: This example is great!

I don't know if Shifu's example is derived from an orginal DFS-flightplan but I suppose that DFS does nothing more than putting the Information from a web-form together in a standard-string and send it somewere

The SMS stuff seems to be simply added BEHIND the Standard part of the flightplan string; therefore the phone-number for SMS and/or Email-adress just is placed at another place - you already have the Information needed

That's what I thought. It means that the extra information is not actually part of the flightplan at all. Therefore it's quite reasonable to think that a flightplan sent from a source other that DFS's own systems couldn't actually include this as part of it. The message that Shifu pasted above is more than likely output from DFS's own systems which is showing you the flightplan and then other metadata. If we were to send stuff outside the actual flightplan message, we would be bound to break all sorts of recipients of the message.

What I'm getting at, is if you want additional notification services provided by a specific flightplan filing system, you really need to use that system.

You can modify most (if not all) the fields before the flightplan is sent, and also add additional addressees.

On SkyDemon Plan, with the flightplan form on screen, you can press Ctrl-Q and the flightplan string will be copied to the clipboard in its entirety.

Perhaps another Approach can be useful:
provide an interface to a SMS-sending application or we just copy and paszte that string and add something.
But the secret is: to which phone-number so I send my SMS?