diff --git a/htdocs/core/class/html.formmail.class.php b/htdocs/core/class/html.formmail.class.php
index 9e3c84fb24d..f7a9b6b41c8 100644
--- a/htdocs/core/class/html.formmail.class.php
+++ b/htdocs/core/class/html.formmail.class.php
@@ -1213,7 +1213,7 @@ class FormMail extends Form
 				}
 				$out .= ' <'.$this->tomail.'>';
 				if ($this->withtofree) {
-					$out .= '<br>'.$langs->trans("and").' <input class="minwidth200" id="sendto" name="sendto" value="'.(!is_array($this->withto) && !is_numeric($this->withto) ? (GETPOSTISSET("sendto") ? GETPOST("sendto") : $this->withto) : "").'" />';
+					$out .= '<br>'.$langs->trans("and").' <input class="minwidth200" id="sendto" name="sendto" spellcheck="false" value="'.(!is_array($this->withto) && !is_numeric($this->withto) ? (GETPOSTISSET("sendto") ? GETPOST("sendto") : $this->withto) : "").'" />';
 				}
 			} else {
 				// Note withto may be a text like 'AllRecipientSelected'
@@ -1222,7 +1222,7 @@ class FormMail extends Form
 		} else {
 			// The free input of email
 			if (!empty($this->withtofree)) {
-				$out .= '<input class="minwidth200" id="sendto" name="sendto" value="'.(($this->withtofree && !is_numeric($this->withtofree)) ? $this->withtofree : (!is_array($this->withto) && !is_numeric($this->withto) ? (GETPOSTISSET("sendto") ? GETPOST("sendto") : $this->withto) : "")).'" />';
+				$out .= '<input class="minwidth200" id="sendto" name="sendto" spellcheck="false" value="'.(($this->withtofree && !is_numeric($this->withtofree)) ? $this->withtofree : (!is_array($this->withto) && !is_numeric($this->withto) ? (GETPOSTISSET("sendto") ? GETPOST("sendto") : $this->withto) : "")).'" />';
 			}
 			// The select combo
 			if (!empty($this->withto) && is_array($this->withto)) {
diff --git a/htdocs/core/class/html.formsms.class.php b/htdocs/core/class/html.formsms.class.php
index cf82ca3c81c..d7e33bfdd3e 100644
--- a/htdocs/core/class/html.formsms.class.php
+++ b/htdocs/core/class/html.formsms.class.php
@@ -315,7 +315,7 @@ function limitChars(textarea, limit, infodiv)
 			if ($this->withtoreadonly) {
 				print (!is_array($this->withto) && !is_numeric($this->withto)) ? $this->withto : "";
 			} else {
-				print '<input class="width150" id="sendto" name="sendto" value="'.dol_escape_htmltag(!is_array($this->withto) && $this->withto != '1' ? (GETPOSTISSET("sendto") ? GETPOST("sendto") : $this->withto) : "+").'">';
+				print '<input class="width150" id="sendto" name="sendto" spellcheck="false" value="'.dol_escape_htmltag(!is_array($this->withto) && $this->withto != '1' ? (GETPOSTISSET("sendto") ? GETPOST("sendto") : $this->withto) : "+").'">';
 				if (!empty($this->withtosocid) && $this->withtosocid > 0) {
 					$liste = array();
 					foreach ($soc->thirdparty_and_contact_phone_array() as $key => $value) {