The Apple Mail App for iOS offers basic text formatting in signatures but does not fully support complex HTML (e.g., tables, custom fonts, embedded images). Some basic formatting may be preserved if pasted from a formatted email.

1. Send the signature to your iOS device.

• On your computer, open the .html file in a web browser.
• Select and copy the entire signature as it appears, including basic formatting and images if any.
• Paste this signature into a new email, and send this email to your iPhone / iPad.

2. Copy the signature from the email on your iPhone / iPad

• Open the email you sent to yourself using the Apple Mail app.
• Highlight the entire signature, then tap Copy.

3. Add your signature in iOS Mail settings

• Open Settings on your iPhone / iPad.
• Scroll down and select Mail.
• Tap Signature.

4. Paste your signature

• If you have multiple email accounts, choose "All Accounts" or "Per Account".
• Tap and hold in the signature box, then select Paste.

5. (Optional) “Shake to Undo” for formatting:

• Apple Mail sometimes strips formatting when pasting. After pasting, shake your device gently and tap Undo to restore formatting (if prompted).

6. Done!

• Your signature updates automatically. Compose a new email to check the signature.

1. Open the signature HTML file

• Locate the .html file containing your signature and open it in your web browser.
• Press Cmd + A (to select all), then Cmd + C (to copy).

2. Open Apple Mail Preferences

• Open the Mail app.
• In the top menu, select Mail > Settings (or Mail > Preferences).
• Select the Signatures tab.

3. Create a new signature

• Choose the email account to use the signature with.
• Click the + icon to create a new signature. Name it if you wish.

4. Paste the signature into the editor

• Select the newly created signature.
• In the right panel, delete any existing content.
• Click into the signature box and press Cmd + V to paste your HTML signature.

5. Drag signature to the account (if necessary)

• Sometimes you may need to drag the new signature from "All Signatures" to your desired email account.

6. Set as default (optional)

• Select your new signature as the default for new emails and/or replies/forwards.

7. Test your signature

• Compose a new email to verify the signature appears as intended.

The Gmail App for iOS does not support advanced HTML signatures. It only allows simple plain text. Images or HTML formatting will not be preserved.

Basic steps for text-based signature:

1. Open the HTML signature on a computer

• Double-click the .html file to open it in a web browser.
• Copy the plain text portion of your email signature (images and formatting will be lost).

2. Send the signature to your phone (optional)

• Email the plain text signature to yourself so you can easily copy it on your iPhone/iPad.

3. Open the Gmail app on your iPhone / iPad

• Tap the three horizontal lines (≡) in the top left.
• Scroll down and tap Settings.
• Tap the email account you want to add a signature to.

4. Tap "Signature Settings" or "Signature"

• Turn on Mobile Signature.

5. Paste the signature

• Tap and hold in the signature box and select Paste to add your plain text signature.

6. Save

• Go back or close the settings; changes are saved automatically.

Troubleshooting / Tips

• For the best experience, set up your signature on an alternative email program which fully supports HTML signatures.
• If you need to use images or custom formatting, use Outlook for Mac or Apple Mail.
• If your signature appears incorrectly, make sure you copied it from a browser window, not a text editor.

The Gmail App for iOS does not support advanced HTML signatures. It only allows simple plain text. Images or HTML formatting will not be preserved.

Basic steps for text-based signature:

1. Open the HTML signature on a computer

• Double-click the .html file to open it in a web browser.
• Copy the plain text portion of your email signature (images and formatting will be lost).

2. Send the text to your Android device

• Email the plain text (or the HTML file as an attachment, but remember: the Gmail app can ONLY use plain text) to your Gmail address, or use another method to get the text onto your phone (such as Google Keep, chat, cloud notes etc.).

3. Copy the signature text on your Android device

• Open the email or note on your phone and copy the plain text portion of the signature.

4. Open the Gmail app 

• Tap the three horizontal lines (≡) in the top left.
• Scroll down and tap Settings.

5. Choose your email account 

• Tap the Google Workspace account you want to set up the signature for.

6. Tap "Signature Settings" or "Signature"

• Scroll down to the General section and tap Mobile Signature.

5. Paste the signature

• Tap and hold in the signature box and select Paste to add your plain text signature.
• You can adjust the text as needed, but advanced formatting (such as bold, color, or links) and images are not possible.

6. Save and Exit

• Tap OK or the back arrow to save.

Troubleshooting / Tips

• For the best experience, set up your signature on an alternative email program which fully supports HTML signatures.
• If your signature appears incorrectly, make sure you copied it from a browser window, not a text editor.

Outlook for iOS does not support advanced HTML signatures. It only allows simple formatted text. Images or HTML formatting will not be preserved.

Basic steps for text-based signature:

1. Copy your signature (basic text only)

• Open your .html signature file in your phone's browser.
• Tap and hold to select the text of your signature (note: formatting and images will not be included).
• Tap Copy.

2. Open Outlook on your iOS device

• Open the Outlook app.
• Tap your profile icon (top left), then the gear icon (settings) at the bottom, then tap Signature.

3. Paste your signature

• Erase any existing text.
• Press and hold, then tap Paste to insert your signature.

4. Save your changes

• Tap back or exit the settings. Your new signature will be saved.

Important: Outlook for iOS does not support HTML signatures or embedded images. Only basic text and some simple formatting (like bold, italic) will appear.

Troubleshooting / Tips

• For the best experience, set up your signature on the desktop version of Outlook, which fully supports HTML signatures.
• If you need to use images or custom formatting, use Outlook for Mac or Windows.
• If your signature appears incorrectly, make sure you copied it from a browser window, not a text editor.

Outlook for iOS does not support advanced HTML signatures. It only allows simple formatted text. Images or HTML formatting will not be preserved.

Basic steps for text-based signature:

1. Copy your signature (basic text only)

• Open your .html signature file in your phone's browser.
• Tap and hold to select the text of your signature (note: formatting and images will not be included).
• Tap Copy.

2. Send the signature text to your Android device

• Email the text to yourself or use another method to get the signature on your phone.

3. Copy the signature text on your Android device

• Open the email or note in your Outlook app or another app on your Android device.
• Select and copy the signature text.

4. Open the Outlook app

• Tap your profile icon or the house icon at the top left corner.
• Tap the settings gear (bottom left or in the sidebar, depending on your version).

5. Select your Google Workspace account

• Tap your email account under Mail accounts.

6. Paste your signature

• Tap Signature
• Press and hold in the signature box, then tap Paste to insert your signature.
• Edit the text as necessary. Again, only plain text will appear.

7. Save your changes

• Tap back or exit the settings. Your new signature will be saved.

Important: Outlook for iOS does not support HTML signatures or embedded images. Only basic text and some simple formatting (like bold, italic) will appear.

Troubleshooting / Tips

• For the best experience, set up your signature on the desktop version of Outlook, which fully supports HTML signatures.
• If your signature appears incorrectly, make sure you copied it from a browser window, not a text editor.

1. Open the signature file

• Locate the .html email signature file provided to you.
• Double-click the file to open it in your web browser.
• Press Cmd + A to select all content, then Cmd + C to copy.

2. Open Outlook for Mac

• Launch Microsoft Outlook.
• In the top menu, click on Outlook and select Preferences.

3. Access Signatures

• In the Preferences window, find and click on Signatures.

4. Create a new signature

• Click the + button at the bottom to add a new signature.
• Name your signature (e.g., "Work Signature").

5. Paste your signature

• In the signature editor, click inside the box and press Cmd + V to paste your copied signature.

6. Set your default signature

• Under Choose default signature, select your new signature for New Messages and Replies / Forwards as desired.

7. Save and close

• Close the Signatures window; your changes will be saved automatically.
• To verify, create a new email and check that your signature appears correctly.

Note: If your signature formatting looks wrong, ensure you copied the content from the web browser displaying your signature, not from a plain text editor.

1. Open the signature file

• Locate the .html email signature file provided to you.
• Double-click the file to open it in your web browser.
• Press Cmd + A to select all content, then Cmd + C to copy.

2. Open Outlook 

• Launch Microsoft Outlook.

3. Go to Signature Settings

• Click File in the top left corner.
• Select Options.
• In the left sidebar, select Mail, then click the Signatures... button on the right

4. Create a new signature

• In the Email Signatures tab, click New.
• Give your signature a name (e.g. "Work Signature").
• Click OK.

5. Paste the HTML signature

• In the "Edit signature" area on the right, remove any text if present.
• Paste your copied HTML signature using Cmd + V.

6. Set your default signature

• Under Choose default signature, select your work email account.
• Set the newly created signature for New messages and / or Replies / forwards as desired.

7. Save and close

• Click OK to close the Signatures and Stationery window.
• Click OK again to close the Outlook Options window.

8. Test your signature

• Compose a new email in Outlook. Your HTML signature should appear at the bottom of the message, fully formatted.

Note: If your signature formatting looks wrong, ensure you copied the content from the web browser displaying your signature, not from a plain text editor.