[toothfairy86]

As an Orthodox Christian, I have been told that if we receive communion in a non-Orthodox church, that we have basically excommunicated ourselves from our church.

[AnAmericanMother]

That's correct. The Catholic Church doesn't have a problem with Orthodox making communion with us, but often the Orthodox authorities do have a problem with that. The guide in the back of our missalette says that Orthodox believers are welcome to commune, but that they had better check with their bishop or metropolitan first.