1. To connect to SMTP, go to System Configuration and select Email Configuration.
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2. You will see three options: Outlook, Google, and SMTP. Select SMTP.
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3. You will see a form where you need to map the SMTP fields.
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4. Important values to keep in mind:

Outgoing Mail
​SMTP Server: smtp.ionos.co.uk
​Port Number: 587
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Incoming Mail (IMAP):
​SMTP Server: imap.ionos.co.uk

Port Number: 993
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5. Enter your email and password, then click on "Connect."
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6. Refer to this screenshot for a detailed view:
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