Email signature guides
Practical, tested, step-by-step — for Apple Mail, iPhone, Gmail, and everything that goes wrong along the way.
Apple Mail basics
How to Add an Email Signature in Apple Mail (macOS)
Add a professional email signature in Apple Mail on your Mac, step by step — including images, per-account signatures, defaults, and the pitfalls to avoid.
How to Add an HTML Email Signature to Apple Mail
The manual way to install a custom HTML email signature in Apple Mail on macOS — editing .mailsignature files — and the one-click alternative.
How to Get an HTML Signature Into Apple Mail — No Code Required
Three no-code routes to a designed HTML signature in Apple Mail, from free-and-fiddly to one click — and why plain pasting never works.
How to Use a Different Signature for Each Email Account in Apple Mail
Set up per-account signatures in Apple Mail — work vs personal, multiple businesses — including per-account defaults and the compose-window switcher.
How to Add a Clickable Logo to Your Apple Mail Signature (Without Broken Attachments)
Add a company logo to your Apple Mail signature that links to your website and doesn't arrive as a broken attachment — the hosted-image method, step by step.
How to Add a Marketing Banner to Your Apple Mail Signature
Turn your email signature into quiet ad space: add a promo banner (webinar, listing, launch) under your Apple Mail signature — sized, linked, and swappable.
iPhone & iPad
How to Add an Email Signature on iPhone (With a Photo That Actually Works)
Set up an email signature on iPhone or iPad — including the only reliable way to keep photos and logos working, and why pasted images usually break.
Why Your Email Signature Looks Different on iPhone vs Mac (and How to Fix It)
Huge fonts, giant logos, missing images — why the same signature renders differently from iPhone Mail vs Apple Mail on the Mac, and how to make them match.
How to Add an iPhone Email Signature That Actually Keeps Its Formatting
Why iPhone Mail mangles pasted signatures (fonts, colors, images) and the exact sequence — including shake-to-undo — that preserves the formatting.
Other mail apps
How to Add an Email Signature in Gmail
Create a Gmail signature step by step — with images, multiple signatures, and defaults for new emails and replies. Plus the mobile app catch.
How to Add an Email Signature in Outlook (Web, Mac & Windows)
Set up an email signature in Outlook on the web, the new Outlook for Mac, and Windows — with defaults for new messages and replies, and images that don't blur.
How to Add an HTML Email Signature in Outlook for Mac
Add a designed email signature in Outlook for Mac — both the New Outlook and the classic/legacy versions — with images that render, without hand-coding HTML.
How to Add an Email Signature in Mimestream (the Mac Gmail App)
Set up a professional HTML email signature in Mimestream, the native Mac Gmail client — including how to get a designed signature with images that render, without hand-writing HTML.
How to Add an Email Signature in Yahoo Mail
Create a Yahoo Mail signature step by step — rich text, per-account toggles, and why the mobile app needs its own signature.
How to Add an Email Signature in iCloud Mail (icloud.com)
Add a signature to iCloud Mail on the web — and understand why it's separate from your Mac and iPhone signatures.
How to Add an Email Signature in Every Major Mail Client (2026)
One page, every client: Apple Mail, iPhone, Gmail, Outlook, Yahoo, iCloud web — the fastest correct path for each, with links to full walkthroughs.
Troubleshooting
Why Your Email Signature Images Are Broken (Every Cause, Fixed)
Question marks, blue boxes, paperclip attachments, images that vanish on iPhone — the seven causes of broken email signature images, and the fix for each.
Fix: Your Email Signature Shows as an Attachment in Outlook (ATT00001, image files, winmail.dat)
Why recipients on Outlook see your signature photo or logo as an attachment (ATT00001.htm, image files, or winmail.dat) instead of inline — and how to fix it for good.
Apple Mail Signature Showing a Blue Box With a Question Mark? Here's the Fix
The blue question-mark box in Apple Mail signatures means a broken image reference. Diagnose which of the three causes you have and fix it for good.
Apple Mail Signatures Disappeared After a macOS Update? Here's How to Get Them Back
macOS updates (Sequoia, Sonoma, Tahoe) regularly lose or unassign Apple Mail signatures. Where they actually went, how to recover them, and how to stop it recurring.
Images Not Showing in Your Apple Mail Signature? Every Cause, Fixed
Signature images that don't show in Apple Mail — for you or your recipients — come down to a handful of causes. Diagnose and fix each one.
Stop iCloud From Wiping Your Apple Mail Signatures (Permanent Fix)
Apple Mail signatures that keep disappearing are usually an iCloud sync conflict between Macs. How the sync actually works, how to find the Mac that's clobbering you, and how to make it stop.
Design & best practices
Professional Email Signature Examples That Actually Work in 2026
Real email signature examples — with photo, logo, call-to-action, and minimal layouts — and why each works. Every example rendered in Apple Mail, not a mockup.
Email Signature Size Guide: Width, Logo, Headshot, and File-Size Numbers
The exact dimensions that work: signature width, headshot and logo sizes, banner dimensions, font sizes, and file-size budgets — with the reasoning.
11 Email Signature Mistakes That Make You Look Unprofessional
The signature mistakes everyone makes — broken images, quote overload, six social icons, image-only signatures — and the quick fix for each.
How to Make Your Email Signature Mobile-Friendly
Most email is read on phones. How to build a signature that stacks, scales, and stays tappable on mobile — widths, breakpoints, and tap targets.
What to Put in a Professional Email Signature (2026 Checklist)
The definitive checklist: what belongs in a professional email signature, what's optional, and what to leave out — with the reasoning for each line.
How to Make an Email Signature That Works in Dark Mode
Why logos vanish and text turns unreadable when recipients use dark mode — and how to build an email signature that survives Apple Mail, Gmail, and Outlook dark themes.
How to Make an Arabic or Hebrew Email Signature (Right-to-Left)
Build a right-to-left email signature for Arabic, Hebrew, Farsi, or Urdu — correct direction, mixed English text that doesn't scramble, and clients that render it properly.
By profession
The Realtor's Email Signature: Compliant, Clickable, and Installed in Apple Mail
What a real estate agent's email signature must include (license number, brokerage), what makes it convert (headshot, tap-to-call, booking CTA), and how to install it properly on Mac and iPhone.
The Consultant's Email Signature: Credibility in Every Reply
What an independent consultant's email signature should include to build trust and book calls — headshot, specialty, booking link — and how to install it in Apple Mail and on iPhone.
The Financial Advisor's Email Signature: Credentials, Compliance, and Trust
What a financial advisor's email signature must include — credentials, firm, and the compliance disclosures FINRA/SEC expect — plus how to install it cleanly in Apple Mail.
The Sales Rep's Email Signature: Built to Get Replies and Book Meetings
How a salesperson or account executive should design an email signature that adds credibility to cold outreach and follow-ups — booking link, headshot, mobile-first — and install it in Apple Mail.
The Photographer's Email Signature: Show the Work, Book the Shoot
How a photographer's email signature should showcase your portfolio and brand — Instagram, portfolio link, booking — without the images breaking, and how to install it in Apple Mail.
The Lawyer's Email Signature: Esq., Disclaimers, and Bar Details Done Right
What belongs in an attorney's email signature — credentials, firm details, confidentiality disclaimer — and how to install it properly in Apple Mail and on iPhone.
The Teacher's Email Signature: Professional, Compliant, and Parent-Friendly
What belongs in an educator's email signature — school, role, contact hours, pronouns if you choose — and how to set it up in Apple Mail and on iPhone.
The Doctor's Email Signature: Credentials, Disclaimers, and a Clean Setup
How physicians and healthcare professionals should structure an email signature — credential order, practice details, confidentiality language — and install it properly.
The Freelancer's Email Signature: Look Bigger Than You Are
A freelancer's signature that wins trust: what to include, the one-person-brand tricks, portfolio and booking links, and the two-minute setup.
Comparisons & alternatives
The Best Email Signature Tool for Mac and Apple Mail (2026)
An honest comparison of email signature tools for Mac users: native apps vs web generators vs enterprise platforms — and who each is actually right for.
Autograph vs WiseStamp (2026): One-Time Mac App vs Subscription Generator
An honest head-to-head: WiseStamp's subscription web generator vs Autograph's one-time native Mac app — install, Apple Mail support, images, iPhone, price, and who should pick which.
Best WiseStamp Alternative for Mac Users (2026)
Looking for a WiseStamp alternative without the subscription? An honest comparison for Mac and Apple Mail users — including one-time-purchase and free options.
Best MySignature Alternative for Mac & Apple Mail (2026)
Looking for a MySignature alternative without the monthly plan or the copy-paste install? The honest options for Mac users, from one-time apps to free generators.
Exclaimer Alternative for Individuals & Small Teams (2026)
Exclaimer is built for IT departments — minimum seats, per-user pricing, Microsoft-first. Here are the honest alternatives if you're one person or a small Mac team.
CodeTwo Alternative for Individuals & Mac Users (2026)
CodeTwo is server-side signature management built for Microsoft 365 admins. Here are the honest alternatives if you're an individual, a Mac user, or a small team that just wants a good signature.
Exclaimer vs WiseStamp vs the Mac-Native Way: Which Signature Approach Fits You?
Three fundamentally different signature architectures — server-side injection (Exclaimer), browser generators (WiseStamp), and native install (Mac apps) — compared honestly by team size, stack, and cost.
Skip the manual work on your Mac
Autograph designs the signature and installs it into Apple Mail in one click — and sets up your iPhone with a QR code.
Download Autograph free See the templates