Mailbox security
Reset the password for a mailbox hosted on a UKC Plesk server, then update every device and application that uses it. The server change is immediate and the old password stops working.
Change it in PleskThe mailbox password is separate from your Client Area and Plesk login passwords.
Update every devicePhones, computers, websites and scanners may keep trying the old password.
Test webmail firstA successful webmail login proves the new mailbox credentials work.
Use the correct password
Changing the mailbox password affects IMAP, POP, SMTP and webmail for that email address. It does not change the password used to sign in to the UKC Client Area or the Plesk control panel.
If the address is hosted by another email provider, change it there rather than in Plesk.
Before changing
Phones and tabletsCheck both incoming and outgoing account settings.
Mail applicationsOutlook, Apple Mail, Thunderbird and other profiles need the new password.
Websites and applicationsContact forms, CRM systems and monitoring tools may authenticate through SMTP.
Office equipmentScanners, printers and network devices can continue sending old credentials.
Plesk steps
Log in to PleskUse “Log in to Plesk” beside the correct UKC hosting service.
Open MailSelect the full email address you want to update.
Enter a strong unique passwordUse Plesk’s generator where available, or create a long password not used by any other account.
Save the accountThe old password stops working as soon as Plesk applies the change.
Update clients
Update the incoming and outgoing server credentials on each device. The username is normally the complete email address. Keep the server names, ports and encryption settings unchanged unless you are correcting a separate configuration problem.
Repeated failed logins can cause a temporary IP block. Turn off mail syncing on devices you cannot update immediately.
Verification
Sign in to webmailUse the complete email address and new password.
Send to an external addressThis checks authenticated outgoing SMTP.
Reply back to the mailboxThis checks incoming delivery and mailbox access.
Update one device at a timeConfirm each works before proceeding to the next.
Troubleshooting
Need help?
Include the email address, UKC server hostname, application and device, incoming or outgoing failure, exact error, approximate time and whether webmail accepts the new password. Do not include the password itself.
Still unable to sign in?Open a support ticket with that evidence and your current public IP address.
