How can shared logins or untracked changes complicate debugging?

A campaign's bounce rate spikes overnight. Your team scrambles to figure out what changed. You ask around: "Did anyone touch the list?" "Did we change authentication settings?" Nobody remembers. That's when shared logins become a liability.

When multiple people log into the same account, you lose the audit trail. Sure, *someone* made a change, but you can't tell who or when without digging through raw logs. That person might have accidentally swapped out your SPF record, reset your DKIM key, or imported a bad list segment. With a shared account, it's guesswork.

And if changes aren't logged or documented? You're flying blind. You don't know what's different from yesterday. Deliverability tools can tell you your bounce rate climbed, but they can't tell you *why* unless there's a change log somewhere.

Here's the real damage. When something breaks (authentication fails, spam complaints spike, sends get delayed), you waste days investigating instead of fixing. You might even undo a good change because you didn't know it was made. Or you'll spend weeks chasing a ghost bug that was actually fixed two days ago but nobody documented it.

Prevention is straightforward. Give each team member their own account with their name attached. That way, every action gets logged to a person. Enable activity logs in your email service provider and review them regularly. If you're working with a third-party agency, require them to document any changes they make to your authentication, list settings, or sending configuration. For sensitive changes (anything that affects sender reputation), add an approval workflow so two people sign off.

Start this week by checking whether your ESP has activity logs enabled and who has access to your account. That's your foundation for faster debugging next time something goes sideways.