Since one week I am in Holland again. I have promised you to send an email. Here are some pictures.

Bir haftadan beri tekrar Hollanda´dayim. Sana bir email gonderdigime soz verdim. Iste bazi resimler.

Is this correct?

 I would say "bir kaç resimlar"  I think bazi more like "from to time pictures".  Just my opinion.  Otherwise I can´t criticize.

Thank you for your advice I will change it.

 I think when you use ´bazı´ the following noun needs to be in the singular - i.e. ´bazı resım´, whereas ´birkac´ take the plural.

Someone correct me if I´m wrong please!!

 I thought if more than one was implied in the question or sentence

then you did not use the plural.  However I am a complete beginner and could be talking nonsense

 It´s exactly the opposite

Bazı resimler (always plural)

Birkaç resim (always singular)

 Agree this is not nonsense.  Bir kaç gün, bir kaç kişi v.b.

oops .. Mltm beat me to it! Sorry, mltm.