
The short answer: create one SMTP credential for each program (the website, the ERP, the front desk printer) and give it a name that says where it lives. When one of them is retired, or ends up in the wrong hands, you revoke only that credential and the others keep sending without anyone touching them.
Why not use the same one everywhere
| What happens | With one shared credential | With one per program |
| You move to a new website or server | You must change the password everywhere at once. | Revoke the old website one. Nothing else stops. |
| A printer is sold or breaks down | The password leaves with it, and it is the same as the website one. | Revoke only the printer one. |
| The developer or agency leaves the project | They keep the password to everything. | Revoke only the one they used. |
| Spam starts going out through the relay | You have no idea where from. | The name and the last use point straight at the culprit. |
Names you will still understand in a year
The name is only for you, but it is what tells you what to revoke. Say what and where: Main website (WordPress), ERP invoicing, Front desk printer, Developer staging site. Avoid names like «test» or «new»: in a few months nobody will know what they were.
What the list shows
| Column | What it is for |
| Name | The name you typed when you created it. |
| Username | The username the program logs in with. The password never appears here. |
| Status | Active or Revoked. |
| Created | When you created it. |
| Last used | The last time a program logged in with it. An active credential that has not been used for a long time is a candidate for revoking. |
Revoking a credential
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| Revoking cannot be undone. A revoked credential never becomes active again: if you made a mistake, create a new one and put it in the program. |
| Does the Email Center say you already have the maximum number of credentials? Look at the Last used column, revoke the ones you no longer need and create the new one. |
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Not sure which credentials to keep? Open a ticket and we will help you tidy up the list. Open a support ticket |
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