diff --git a/lib/classes/mail/class.mailLogParser.php b/lib/classes/mail/class.mailLogParser.php
index d9930bd2..007c398c 100644
--- a/lib/classes/mail/class.mailLogParser.php
+++ b/lib/classes/mail/class.mailLogParser.php
@@ -189,7 +189,7 @@ class MailLogParser {
 
 			$timestamp = $this->_getLogTimestamp($line);
 			if ($this->startTime < $timestamp) {
-				if (preg_match("/dovecot.*(?::|\]) imap\(.*@([a-z0-9\.\-]+)\):.*in=(\d+) out=(\d+)/i", $line, $matches)) {
+				if (preg_match("/dovecot.*(?::|\]) imap\(.*@([a-z0-9\.\-]+)\):.*(?:in=(\d+) out=(\d+)|bytes=(\d+)\/(\d+))/i", $line, $matches)) {
 					// Dovecot IMAP
 					$this->_addDomainTraffic($matches[1], (int)$matches[2] + (int)$matches[3], $timestamp);
 				} elseif (preg_match("/dovecot.*(?::|\]) pop3\(.*@([a-z0-9\.\-]+)\):.*size=(\d+)/i", $line, $matches)) {