Auch an Alba

I use a title if I know the person has one, Dr or Prof (never both, only Germans do that and possibly Austrians) but I always sign off with my first name only and usually the person respond with "Dear Alba" signs of with they first name and within 2 emails we are on a first name basis.
I use Ms as a standard for women if i know they don't have a title and Mr for a man but again this is usually for a first contact, we will be on first name terms by the next email.