ITR-V Clarification

1) While Form ITR-V at the bottom mentions that the same should be sent to Bangalore by "ORDINARY POST ONLY",the e-mail confirmation received on successful uploading of the XML File gives the option of sending the same either through "SPEED POST" or ordinary post within 120 days (Pt. No. 5).Which is correct?Can we send by Speed Post?Or will it get rejected?

2) Can 5 (Nos.) ITR-V be enclosed in one single envelope?Will it pose a problem?

Many thanks for an early reply.