Almost every cheap lead list has the same defect. It is a column of addresses and nothing else. No name, no job title, no phone number, no idea whether the address is a person or a shared inbox that four people ignore.
The problem with info@
A generic mailbox is a queue, not a person. Mail sent to info@ lands in a shared tray somebody triages between other jobs. It is nobody's responsibility to answer you, which is why it usually goes unanswered.
That is not an argument for discarding them. It is an argument for knowing which is which before you write, because the message that works on a named managing director is not the message that works on a reception inbox.
What a lead needs to be actionable
- An address, obviously.
- A name and a job title, so the first line is not "Dear Sir/Madam".
- A phone number, because the fastest close is often not email at all.
- A postal address, which tells you whether they are even in your territory.
- The mail provider, because a Gmail address and a Microsoft 365 address behave differently in a cold sequence.
The test
Take any row in your list and ask: could a salesperson act on this in the next ten minutes without opening another tab? If the answer is no, the row is not a lead. It is a research task you have not done yet.