http://mail.mycosmos.gr/mycosmos/FAQ/MyCosmos_faqs_en.htm
Sto 5 :
What is the storage capacity provided by the E-mail service and what is the largest mail that I can send or receive?
The storage capacity that the E-mail service provides is 20ΜΒ, while there is no limit to e-mail size being sent or received.
Den exei orio...