Not extracting mail signatures for minor changes in email/signature.

[juanjohn]

The following code which is the example works while running the library and returns signature as expected.

message = """Thanks Sasha, I can't go any higher and is why I limited it to the
homepage.

John Doe
via mobile"""

text, signature = signature.extract(message, sender='john.doe@example.com')

But when i make a minor edit as changing the sender name and his email id the signature returns "None". The following were values passed to signature.extract()

message = """
Hello ,
Thanks Sasha, I can't go any higher and is why I limited it to the
homepage.

Sam John
via mobile"""

text, signature = signature.extract(message, sender='samjohn@gmail.com')

Signature returned None for most of the messages that were tried.

[obukhov-sergey]

Hi @juanjohn. In the 1st example 'john.doe@example.com' has a separator between first and last name. So the algo can detect that the sender's first name is John and his last name is Doe. First / Last name in the end of the message is a strong indicator that the line is signature. In your 2nd example the algo can't distract first / last name of the sender and there are not enough other indicators to detect a signature.