There are four main versions of the mbox format. Thunderbird, Mozilla Suite, Netscape, Portable Thunderbird, Postbox, Spicebird, SeaMonkey and the open source version of Eudora use a slightly modified version of the mboxrd variant of this format. The proprietary version of Eudora uses a slightly modified version of the mboxo variant. Most Windows email clients that use mbox files will use a mboxo or mboxrd version, and you should have little trouble importing them. Under Linux you're more likely to run into an mboxcl or mboxcl2 version, which is incompatible. Both Kmail and Evolution use a compatible version. You might try migrating your messages to Kmail as an intermediate step since it supports importing numerous formats.
The Bulgarian lev is pegged to the euro and its value therefore varies with that of the euro and can fluctuate accordingly in relation to other world currencies. Don’t be too optimistic about the exchange rate and bear in mind that a sudden fluctuation can cost you thousands of lev (or euros, pounds or dollars). For example, if you’re buying a home in Bulgaria costing €50,000 and paying in sterling, this would be equal to £33,333, at an exchange rate of £1 = €. But if the £/€ exchange rate falls to € between the time your purchase offer is accepted and the time you come to pay, it will cost you £35,714 – an increase of £2,381! It’s possible to ‘fix’ the exchange rate to guard against unexpected devaluations by purchasing a ‘forward time option’ or ‘limit order’ from your bank or from a specialised currency exchange firm; the further in advance you buy, the more you pay. The only downside is that you may regret doing so if there’s a big swing in your favour! It’s recommended that you open an account with a Bulgarian bank if you decide to transfer money to Bulgaria. Declaration The Bulgarian lev is a ‘controlled’ currency, which means that there are certain restrictions on the import and export of funds. These are constantly changing so you should check the latest regulations before importing or exporting currency. You cannot currently buy lev outside Bulgaria, but you can take lev out of Bulgaria and bring them back with you, subject to the following restrictions: