diff --git a/Classes/Finisher/Forms/FormsFinisher.php b/Classes/Finisher/Forms/FormsFinisher.php
index da5cb879b5b28ef761aed2f359f0489553b36f57..b896813469a63630c21a58c361ebb320d167494b 100644
--- a/Classes/Finisher/Forms/FormsFinisher.php
+++ b/Classes/Finisher/Forms/FormsFinisher.php
@@ -92,7 +92,7 @@ class FormsFinisher extends AbstractFinisher {
 			}
 		}
 
-		$templateName = $this->parseOption('template');
+		$templateName = trim($this->parseOption('template'));
 		if ($this->parseOption('template') === '') {
 			$templateName = $formDefinition->getIdentifier();
 		}
@@ -107,12 +107,36 @@ class FormsFinisher extends AbstractFinisher {
 
 		$mailTemplateService->setIgnoreMailQueue($ignoreMailQueue);
 		$mailTemplateService->setLanguage($GLOBALS['TSFE']->config['config']['language']);
-		$mailTemplateService->setToAddresses($this->parseOption('mailTo'));
-		$mailTemplateService->setFromAddress($this->parseOption('mailFrom'));
-		$mailTemplateService->setFromName($this->parseOption('userName'));
-		$mailTemplateService->setReplyToAddress($this->parseOption('replyTo'));
-		$mailTemplateService->setCcAddresses($this->parseOption('cc'));
-		$mailTemplateService->setBccAddresses($this->parseOption('bcc'));
+
+		$mailToAdresses = trim($this->parseOption('mailTo'));
+		if ($mailToAdresses !== '') {
+			$mailTemplateService->setToAddresses($this->parseOption('mailTo'));
+		}
+
+		$fromAddress = trim($this->parseOption('mailFrom'));
+		if ($fromAddress !== '') {
+			$mailTemplateService->setFromAddress($fromAddress);
+		}
+
+		$fromName = trim($this->parseOption('userName'));
+		if ($fromName !== '') {
+			$mailTemplateService->setFromName($fromName);
+		}
+
+		$replyTo = trim($this->parseOption('replyTo'));
+		if ($replyTo !== '') {
+			$mailTemplateService->setReplyToAddress($replyTo);
+		}
+
+		$ccAddresses = trim($this->parseOption('cc'));
+		if ($ccAddresses !== '') {
+			$mailTemplateService->setCcAddresses($ccAddresses);
+		}
+
+		$bccAddresses = trim($this->parseOption('bcc'));
+		if ($bccAddresses !== '') {
+			$mailTemplateService->setBccAddresses($bccAddresses);
+		}
 
 		$mailTemplateService->sendEmail();
 	}
diff --git a/Classes/Service/MailTemplateService.php b/Classes/Service/MailTemplateService.php
index b85c0244df3a4f128562cbd969fec65c666adc62..f49ddbb569b5d6f8d10a0d07e55af760aeb75dfb 100644
--- a/Classes/Service/MailTemplateService.php
+++ b/Classes/Service/MailTemplateService.php
@@ -206,11 +206,11 @@ class MailTemplateService {
 			}
 		}
 
-		if (count($this->bccAddresses) > 0) {
+		if (\count($this->bccAddresses) > 0) {
 			$this->mailMessage->setBcc($this->bccAddresses);
 		}
 
-		if (count($this->ccAddresses) > 0) {
+		if (\count($this->ccAddresses) > 0) {
 			$this->mailMessage->setCc($this->ccAddresses);
 		}
 	}
@@ -223,7 +223,7 @@ class MailTemplateService {
 	 * @param string $extensionKey
 	 * @return array
 	 */
-	public static function getDefaultTemplateMarker($translationKey, array $marker, $extensionKey = 'sg_mail') {
+	public static function getDefaultTemplateMarker($translationKey, array $marker, $extensionKey = 'sg_mail'): array {
 		$languagePath = 'LLL:EXT:' . $extensionKey . '/Resources/Private/Language/locallang.xlf:' . $translationKey;
 
 		// Need the key for translations
@@ -267,8 +267,9 @@ class MailTemplateService {
 		}
 
 		if ($this->pid) {
-			$pageUid = (int) $this->pid;
+			$pageUid = $this->pid;
 		}
+
 		if ($pageUid === 0) {
 			$pageRepository = $this->objectManager->get(PageRepository::class);
 			$rootPageRows = $pageRepository->getRecordsByField(
@@ -297,15 +298,14 @@ class MailTemplateService {
 		}
 
 		// get default template content from register array
-		$defaultTemplateContent = $registerService->getRegisterArray(
-		)[$this->extensionKey][$this->templateName]['templateContent'];
-//		var_dump($registerService->getRegisterArray()[$this->extensionKey][$this->templateName]); die();
-//		var_dump($defaultTemplateContent); die();
+		$defaultTemplateContent = $registerService->getRegisterArray()
+		[$this->extensionKey][$this->templateName]['templateContent'];
+
 		// If there is no template for this language, use the default template
 		if ($template === NULL) {
 			if ($defaultTemplateContent === NULL) {
-				$templatePath = $registerService->getRegisterArray(
-				)[$this->extensionKey][$this->templateName]['templatePath'];
+				$templatePath = $registerService->getRegisterArray()
+				[$this->extensionKey][$this->templateName]['templatePath'];
 
 				// only standard template file is considered since version 4.1
 				$defaultTemplateFile = $templatePath . 'template.html';
@@ -334,8 +334,8 @@ class MailTemplateService {
 
 		if ($isPreview) {
 			$previewMarker = [];
-			/** @var array $markerArray */
 
+			/** @var array $markerArray */
 			$markerArray = $registerService->getRegisterArray()[$this->extensionKey][$this->templateName]['marker'];
 			foreach ($markerArray as $marker) {
 				$markerPath = GeneralUtility::trimExplode('.', $marker['marker']);
@@ -373,7 +373,8 @@ class MailTemplateService {
 			$subject = $registerService->getRegisterArray()[$this->extensionKey][$this->templateName]['subject'];
 			if (\is_array($subject)) {
 				$subject = \trim(
-					$registerService->getRegisterArray()[$this->extensionKey][$this->templateName]['subject'][$this->language]
+					$registerService->getRegisterArray()
+					[$this->extensionKey][$this->templateName]['subject'][$this->language]
 				);
 			}
 			if ($subject === NULL && $this->subject !== NULL) {
@@ -543,7 +544,7 @@ class MailTemplateService {
 	 * @param string $toAddresses
 	 * @return MailTemplateService
 	 */
-	public function setToAddresses($toAddresses) {
+	public function setToAddresses($toAddresses): MailTemplateService {
 		$toAddresses = trim(preg_replace('~\x{00a0}~siu', ' ', $toAddresses));
 		$this->toAddresses = $toAddresses;
 
@@ -560,7 +561,7 @@ class MailTemplateService {
 	 * @param string $fromName
 	 * @return MailTemplateService
 	 */
-	public function setFromAddress($fromAddress, $fromName = '') {
+	public function setFromAddress($fromAddress, $fromName = ''): MailTemplateService {
 		if ($fromAddress) {
 			$this->fromAddress = $fromAddress;
 			$this->mailMessage->setFrom($fromAddress, $fromName);
@@ -573,7 +574,7 @@ class MailTemplateService {
 	 * @param string $ccAddresses
 	 * @return MailTemplateService
 	 */
-	public function setCcAddresses($ccAddresses) {
+	public function setCcAddresses($ccAddresses): MailTemplateService {
 		if ($ccAddresses) {
 			$this->ccAddresses = $ccAddresses;
 			$this->mailMessage->setCc(GeneralUtility::trimExplode(',', $this->ccAddresses));
@@ -586,7 +587,7 @@ class MailTemplateService {
 	 * @param string $replyToAddress
 	 * @return MailTemplateService
 	 */
-	public function setReplyToAddress($replyToAddress) {
+	public function setReplyToAddress($replyToAddress): MailTemplateService {
 		if ($replyToAddress) {
 			$this->replyToAddress = $replyToAddress;
 			$this->mailMessage->setReplyTo($replyToAddress);
@@ -599,7 +600,7 @@ class MailTemplateService {
 	 * @param string $language
 	 * @return MailTemplateService
 	 */
-	public function setLanguage($language) {
+	public function setLanguage($language): MailTemplateService {
 		$this->language = $language;
 		return $this;
 	}
@@ -608,7 +609,7 @@ class MailTemplateService {
 	 * @param boolean $ignoreMailQueue
 	 * @return MailTemplateService
 	 */
-	public function setIgnoreMailQueue($ignoreMailQueue) {
+	public function setIgnoreMailQueue($ignoreMailQueue): MailTemplateService {
 		$this->ignoreMailQueue = $ignoreMailQueue;
 		return $this;
 	}
@@ -617,7 +618,7 @@ class MailTemplateService {
 	 * @param string $templateName
 	 * @return MailTemplateService
 	 */
-	public function setTemplateName($templateName) {
+	public function setTemplateName($templateName): MailTemplateService {
 		$this->templateName = $templateName;
 		return $this;
 	}
@@ -626,7 +627,7 @@ class MailTemplateService {
 	 * @param string $extensionKey
 	 * @return MailTemplateService
 	 */
-	public function setExtensionKey($extensionKey) {
+	public function setExtensionKey($extensionKey): MailTemplateService {
 		$this->extensionKey = $extensionKey;
 		return $this;
 	}
@@ -635,7 +636,7 @@ class MailTemplateService {
 	 * @param array $markers
 	 * @return MailTemplateService
 	 */
-	public function setMarkers(array $markers) {
+	public function setMarkers(array $markers): MailTemplateService {
 		$this->markers = $markers;
 		return $this;
 	}
@@ -644,7 +645,7 @@ class MailTemplateService {
 	 * @param string $bccAddresses
 	 * @return MailTemplateService
 	 */
-	public function setBccAddresses($bccAddresses) {
+	public function setBccAddresses($bccAddresses): MailTemplateService {
 		if ($bccAddresses) {
 			$this->bccAddresses = $bccAddresses;
 			$this->mailMessage->setBcc(GeneralUtility::trimExplode(',', $this->bccAddresses));
@@ -657,7 +658,7 @@ class MailTemplateService {
 	 * @param int $priority
 	 * @return MailTemplateService
 	 */
-	public function setPriority($priority) {
+	public function setPriority($priority): MailTemplateService {
 		$this->priority = $priority;
 		return $this;
 	}
@@ -668,7 +669,7 @@ class MailTemplateService {
 	 * @param string $contentType
 	 * @return MailTemplateService
 	 */
-	public function addAttachment($data, $filename, $contentType) {
+	public function addAttachment($data, $filename, $contentType): MailTemplateService {
 		$attachment = Swift_Attachment::newInstance()
 			->setFilename($filename)
 			->setContentType($contentType)
@@ -683,7 +684,7 @@ class MailTemplateService {
 	 * @param FileInterface|FileReference $file
 	 * @return MailTemplateService
 	 */
-	public function addFileResourceAttachment($file) {
+	public function addFileResourceAttachment($file): MailTemplateService {
 		if ($file instanceof FileReference) {
 			$file = $file->getOriginalResource()->getOriginalFile();
 		}
@@ -706,7 +707,7 @@ class MailTemplateService {
 	/**
 	 * @return MailMessage
 	 */
-	public function getMailMessage() {
+	public function getMailMessage(): MailMessage {
 		return $this->mailMessage;
 	}
 
@@ -774,7 +775,7 @@ class MailTemplateService {
 	 * @param int $pid
 	 * @return MailTemplateService
 	 */
-	public function setPid($pid) {
+	public function setPid($pid): MailTemplateService {
 		$this->pid = (int) $pid;
 		return $this;
 	}