As I'm running out of space I need to delete space wasting mails. Is there any option in Gmail that adds a size column in the mail list or even sorts them by size?
Gmail now supports searching by size: http://support.google.com/mail/bin/answer.py?hl=en&answer=7190
The new operators are:
size:— Search for messages larger than the specified size in bytes
- Meaning: All messages larger than 1MB (1,000,000 bytes) in size.
smaller:— Similar to
size:but allows abbreviations for numbers
- Meaning: All messages of at least 10M bytes (10,000,000 bytes) in size.
You can now search for emails of that size and delete any to free up space.
You can try Find Big Mail.
Finds big emails in your Gmail account and then tags them for you, so you can find spot them easily.