import re

if __name__ == '__main__':

    text = "Inbox - blablabla@gmail.com"

    match = re.findall('- ([^@]+)', text)
    print '1:', match[0]

    match = re.findall('- [^@]+', text)
    print '2:', match[0]

    match = re.search('- ([^@]+)', text)
    print '3:', match.group(0)
    print '4:', match.group(1)

    match = re.search('- [^@]+', text)
    print '5:', match.group()

#---------
1: blablabla
2: - blablabla
3: - blablabla
4: blablabla
5: - blablabla