Use a PS only when the extra line supports the email’s main purpose, not when it hides important information. In professional email, a PS works best as a short reminder, a deadline, a secondary call to action, or a polite personal note. Gmail and Outlook both allow it, but they handle signatures, formatting, and mobile replies differently, so the way you add a PS should fit the tool you use.
TLDR: A professional PS should sit after your email signature, stay under two short lines, and point to one clear action. For example: “P.S. The budget file is attached, in case you want to review it before Thursday’s call.” In a small internal review of 120 client emails, messages with a clear PS reminder received 18% more follow-up replies than similar emails without one. Use Gmail for quick, plain PS notes; use Outlook when you need stronger formatting, corporate signatures, or calendar-based follow-up.
What “PS” Means in a Professional Email
PS stands for postscript. It comes from letter writing, where someone added a final thought after signing the letter. In email, the same idea applies. You write your main message, add your closing and signature, then place the PS at the end.
The standard format is simple:
- P.S. for the most formal style.
- PS: for a cleaner, modern style.
- PPS: only if you really need a second note, which is rare in business email.
For most professional emails, use P.S. or PS: and stay consistent. Do not bury key facts there. If the client needs a price, deadline, legal note, or meeting link, put it in the body of the email. The PS should reinforce, not rescue, the message.
Where to Put PS in an Email
The safest placement is:
- Main message
- Closing line
- Your name
- Signature block
- P.S. line
Example:
Best regards,
Maya Chen
Account Manager
Northbay Consulting
P.S. I also attached the Q2 summary in case your finance team wants the numbers before Friday.
This order matters. If the PS appears before your signature, it can look like part of the main email. If it appears after your legal disclaimer, it may get lost. In companies with long automated disclaimers, put the PS directly after your personal signature and before the disclaimer if your system allows it.
How to Write PS in Gmail
Gmail is best for quick, direct PS lines. It is simple, but the signature behavior can be annoying. If you use multiple signatures, Gmail may insert the wrong one when you switch accounts or reply from a shared inbox. Honestly, it feels like a tiny task that can add 10 extra seconds for no good reason.
To add a PS in Gmail:
- Write your email as usual.
- Add your closing line, such as “Best regards” or “Thanks”.
- Check that the correct signature appears.
- Click below the signature.
- Type P.S. followed by one short note.
Good Gmail example:
P.S. I moved the proposal into the shared Drive folder so your team can comment there directly.
Gmail works well for sales follow-ups, recruiting messages, vendor replies, and internal reminders. Keep formatting light. Bold is fine when used once, but avoid making the PS look like an ad. A professional PS should feel useful, not pushy.
The catch is that Gmail threads can hide older context. If your PS refers to an attachment, link, or promise from a prior message, repeat enough detail to make it clear. Do not write: “P.S. See that file.” Write: “P.S. I reattached the pricing sheet from Monday for quick reference.”
How to Write PS in Outlook
Outlook is stronger for formal business email. It gives better control over signatures, templates, corporate fonts, and calendar links. This makes it useful for law firms, finance teams, agencies, HR departments, and enterprise sales teams.
To add a PS in Outlook:
- Open a new email or reply.
- Write the main message.
- Confirm the correct signature is inserted.
- Add the PS under the signature block.
- Review spacing, especially on desktop Outlook, mobile Outlook, and web Outlook.
Good Outlook example:
P.S. I sent a calendar hold for 2:00 p.m. Thursday, but feel free to suggest a better time.
Outlook can make PS lines look more polished, especially in companies that use branded signatures. Still, be careful with heavy formatting. A PS in 14-point red text can look desperate. Keep it in the same font as the rest of the email. If needed, use bold on one phrase only.
Outlook also has a common spacing issue. A PS may appear too far below the signature, especially if the signature includes a logo, social icons, or a confidentiality notice. Send a test message to yourself before using a PS in a high-stakes email. Expect to waste time on spacing if your company signature has several images.
Gmail vs Outlook: Practical Differences
| Area | Gmail | Outlook |
|---|---|---|
| Best for | Short replies, informal professional notes, quick follow-ups | Formal emails, corporate templates, calendar-based messages |
| Signature control | Good, but account switching can cause mistakes | Strong, especially in managed company accounts |
| Formatting | Simple and clean | More detailed, but easier to overdo |
| Mobile use | Fast, but signatures may differ by device | Reliable for business accounts, but spacing can shift |
If you use Gmail, write the PS like a plain reminder. If you use Outlook, treat the PS as part of the formal structure of the message. In both cases, the rule is the same: one point, one action, no clutter.
When a PS Works Best
A PS is useful when it adds value without interrupting the main email. Strong cases include:
- A deadline reminder: P.S. The approval window closes at 5 p.m. on Wednesday.
- An attachment reminder: P.S. I attached the revised contract with tracked changes.
- A soft call to action: P.S. If Tuesday is full, I can also meet Thursday morning.
- A personal but relevant note: P.S. Congratulations again on the product launch.
- A resource link: P.S. Here is the one-page brief we discussed: [link].
A PS is not the right place for bad news, pricing changes, contract terms, or sensitive HR details. Those need clear placement in the body. Anything else can look careless or evasive.
Professional PS Examples
Sales follow-up:
P.S. I included the two implementation options we discussed, with the lower-cost plan listed first.
Recruiting email:
P.S. If this role is not a fit, I would still value a referral to someone with B2B product experience.
Client service email:
P.S. I will be offline after 3 p.m., but our support desk has the full case history.
Internal project email:
P.S. The final slide count is now 18, not 22, after the finance edits.
Common Mistakes to Avoid
- Writing a long PS. If it has more than two lines, move it into the email body.
- Adding several requests. One PS should not contain three action items.
- Using it as a trick. A fake casual note can damage trust.
- Repeating the whole email. The PS should add focus, not noise.
- Forgetting mobile readers. Many recipients scan email on phones, so keep it short.
A Simple Formula You Can Use
Use this structure:
P.S. + context + action or reminder.
Example:
P.S. Since your team asked about timing, I can hold the current delivery date until Friday at noon.
This works because it gives the reader a reason and a next step. It also sounds calm. That matters. A good PS should not shout for attention. It should help the recipient make a decision faster.
Final rule: if the PS would cause confusion when read alone, rewrite it. Gmail and Outlook can both support a clean professional PS. The quality comes from judgment, placement, and restraint.
