Magento:: Get Store Email Addresses

General Contact:

/* Sender Name */
Mage::getStoreConfig('trans_email/ident_general/name'); 
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_general/email');

Sales Representative:

/* Sender Name */
Mage::getStoreConfig('trans_email/ident_sales/name'); 
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_sales/email');

Customer Support:

/* Sender Name */
Mage::getStoreConfig('trans_email/ident_support/name'); 
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_support/email');

Custom Email 1:

/* Sender Name */
Mage::getStoreConfig('trans_email/ident_custom1/name'); 
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_custom1/email');

Custom Email 2:

/* Sender Name */
Mage::getStoreConfig('trans_email/ident_custom2/name'); 
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_custom2/email');