1. Go to Settings > Mail > Accounts
  2. Tap your Ecenica email account.
  3. Tap Account.
  4. Tap the Email field.
  5. Tap Add Another Email…
  6. Enter the email address you want to send email from. Tap Return
  7. Tap Account at the top left.
  8. Tap Done at the top right.

Open the Mail app on your iPhone and compose a new email. Tap From and select the email alias you’ve added.