Sending mail to people who didn’t ask for it is often just asking for trouble. Having people give you permission to send to them is much better. In an ideal world you want first-party consent meaning that people directly subscribed to your list. You have measures in place to confirm that they really did sign up and someone didn’t just stuff their address into a subscription form. These people want your emails. ...
Many senders have concerns about sending bulk email with PDF attachments. ESPs often advise customers against doing so and suggest alternate solutions like linking to a web portal that has the PDF file. This is all very sensible. But what happens if you must send an PDF attachment due to a regulatory or some other mandatory requirement - is the campaign guaranteed to fail? The answer is no. It is possible to send a PDF attachment as part of a bulk campaign and give it a very good chance of reaching inboxes. ...