PostfachThe right signature, without a thought.
An account that answers in German and in French. A full signature for customers and a short one for colleagues. In Postfach every account has up to twenty signatures, one of them the default, with bold, italic, underline, and links, and with a picture under them: your logo or a photo. A reply with a template gets the signature in the template's language, by itself.
Several per account, one the default.
In Settings › Signatures your accounts are on the left and the picked one's signatures on the right. A menu over the text goes from one to the next, New Signature adds another, and Use as Default makes the one shown the one new messages, replies, and forwards begin with. Once an account has two signatures, each gets a name to pick it by.
As you write, the Signature menu is at hand: on the Mac at the right of the From row, on the iPhone and the iPad in a row of its own above the subject. There you pick another signature for this one message, or none.
- Up to twenty signatures per account, each with a name, a text, and a picture of its own
- The default goes into new messages, replies, forwards, and replies with a template
- Pick another and it takes the place of the one before, above the quote
- Change the sender and the other account's signature comes. Where you changed the block by hand, it stays as you wrote it
- A draft you finish later keeps its signature
The signature follows the language.
A folder of your templates has a language, and now a signature has one too. Give an account a signature in French, and a reply with a template from the French folder gets it, while your other replies keep the default. For an account that answers in several languages, that is one step less in every reply, and one that cannot be forgotten.
- From two signatures on, each has a Language menu under its name, with No Language and the languages of the template folders
- A template folder in German picks the German signature, one in French the French
- Insert a template into an open message and the signature of its language comes along, unless you picked another in the Signature menu
- Where an account has no signature in that language, it keeps the default
Bold, italic, underlined, linked.
A signature's text can be formatted, with a bar over the editor: Bold, Italic, Underline, and Add Link, and on the Mac ⌘B, ⌘I, ⌘U, and ⌘K. A link leads to a web address, an email address, or a phone number, which the recipient calls with a tap.
The editor keeps only what a signature sends. Paste text from a website and it loses its colours and other fonts and takes your message's font. What you see in Settings is what the recipient gets.
- Formatted in messages with HTML, plain in plain text
- Only links a mail app may open: web, email, phone
- From macOS 26, iOS 26, and iPadOS 26. On older systems the editor is plain, and a change made there leaves the formatting in place as long as the text stays the same
A logo underneath.
Choose Picture… puts a picture under a signature's text: from a file on the Mac, from your photos on the iPhone and the iPad. Postfach makes it fit as you choose it. It is turned upright, scaled down to 600 × 300 pixels at most, never enlarged, and written anew until it weighs less than 256 KB; a logo with a transparent background stays transparent. Written anew, it carries nothing of the original file: no camera, no place, no date.
In the message it is shown at half its pixels, so it is sharp on a Retina display and does not take over the message. It stands where the signature stands: in a reply above the quote, in a new message at the end.
- The picture travels in the message, not as a link to a server: the recipient loads nothing, and nobody learns when the message is opened
- In messages with HTML only. A message in plain text goes out without the picture, and the composer does not show it then either
- The × beside the preview leaves it out of this one message; the signature keeps it
- A file over 50 MB or a picture over 100 megapixels is refused, with a sentence that says why
- Your sent messages keep the picture on the device, also where an account leaves attachments and pictures on the mail server
What a signature cannot do.
A signature in Postfach is text with a few formats and a picture under it, so it looks the same for every recipient and loads nothing from other servers. HTML from a signature generator cannot be pasted in: its pictures would sit on a web server, and your recipients would have to load them from there.
- No colours and no font sizes of your own
- One picture per signature, under the text, not in the middle of it
- A sender address has no signature of its own: it uses its account's signatures
- The settings file takes texts, names, languages, and formatting to another device, not the pictures: you choose them there again
Good to know.
On your device
Signatures and their pictures are kept on your Mac, iPhone, or iPad. No service of ours holds them, and none sees the messages they go into.
On every device
The settings file takes an account's signatures to your other devices with the rest of its settings, with their names, languages, and formatting.
Your change stands
What you change in a message's signature block stays: no change of sender and no template writes over it.
Get Postfach.
Every account with its signatures, on Mac, iPhone, and iPad. From the App Store, one purchase for all three.
