What Is an Email Signature?
TL;DR
An email signature is the block at the end of a message carrying the sender name, role, company and contact details. In cold outreach it doubles as a compliance surface, because a valid physical postal address and a way to opt out are things the message is required to carry.
What should a cold email signature contain?
Name, role, company, one link, and the compliance elements. The CAN-SPAM Act requires a valid physical postal address in every commercial message, and the signature is where senders normally satisfy it, alongside a plain line telling the reader how to stop receiving mail.
Everything past that is optional and most of it costs more than it returns. A signature with several links, a scheduling button, a social row and a legal disclaimer is longer than many cold emails and gives the reader four things to do instead of one.
Why do heavy signatures hurt cold email?
Because they make a first-touch message look like a marketing send. Images, banners, tracking pixels and link-heavy blocks are the visual signature of bulk mail, and they arrive before the reader has decided the sender is a person writing to them specifically.
They also fail quietly. Many clients block remote images by default, so an image-based signature renders as empty boxes or nothing at all, and a sender whose name and contact details live inside that image has sent an anonymous email.
Frequently asked questions
It needs one in the message, and the signature is the conventional place. CAN-SPAM requires a valid physical postal address in commercial email, which can be a street address, a registered post office box, or a mailbox registered with a commercial mail receiving agency.