My opinion just leave it and if people want you they can call you. You are on holiday ie not working!
However your ISP may or may not allow you to keep the mail on the server. To be honest the best option is to just go to an internet cafe and do it that way and connect using the online version. If you really have to do it on the phone what you do is get the user manual out and then find the section where you set up email (often where MMS and all those settings are). Then just use the standard settings you use for getting the email and make sure the option is to copy and not to delete the mail. You may have to check with your ISP however if they allow it or if you need to change any settings.