Apply signature to the first email only (don't add signatures to subsequent emails)
The option Apply signature to the first email only (don't add signatures to subsequent emails) appends an email signature only to the first email conversation. For subsequent conversations and replies from the same email thread, no email signature is added irrespective of the rules present in Signature Rules. The email signature for the very first conversation is retained as it is and is not removed.
As shown in the screenshot below, the email signature is added only to the first email (#email1) from the sender and is not added for the subsequent email (second email which is numbered as #email2) from the same sender.
There are two additional options under signature rules to customize adding different signatures to subsequent emails or use the same signature for all the emails. Know more...
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