https://github.com/Webklex/php-imap/issues/291

Author: gordonprimeeco

src/Connection/Protocols/ImapProtocol.php

@@ -110,15 +110,12 @@ protected function enableStartTls(){
      * @throws RuntimeException
      */
     public function nextLine(): string {
-        $line = "";
-        while (($next_char = fread($this->stream, 1)) !== false && $next_char !== "\n") {
-            $line .= $next_char;
+        $line = fgets($this->stream);
+        if ($line === false) {
+            throw new RuntimeException('no response');
         }
-        if ($line === "" && $next_char === false) {
-            throw new RuntimeException('empty response');
-        }
-        if ($this->debug) echo "<< ".$line."\n";
-        return $line . "\n";
+        if ($this->debug) echo "<< ".$line;
+        return $line;
     }
 
     /**