Does one's ISP affect mail delivery/blacklisting?
This might be a silly question, but does one’s ISP affect mail delivery/blacklisting, or just the mail server?
We use Office 365 (Exchange Online) for mail, which is not on any blacklist. However, we use Comcast Business for internet, and our dynamic ip is currently showing up on a few blacklists.
Will this affect our mail delivery – and if so, are we better off switching to a static ip? We never considered static before since we don’t host our website, but if it helps with mail delivery we'll do it.
Can you please advise?