diff --git a/config-files.c b/config-files.c
index df937c1..21eec8c 100644
--- a/config-files.c
+++ b/config-files.c
@@ -70,7 +70,7 @@ int InitPetidomo(const char* masterconfig)
     MasterConfig = calloc(sizeof(struct PD_Config), 1);
     if (MasterConfig == NULL)
         {
-        syslog(LOG_ERR, "Failed to allocate %d byte of memory.", sizeof(struct PD_Config));
+        syslog(LOG_ERR, "Failed to allocate memory for the global PD_Config data structure.");
         return -1;
         }
 
@@ -254,7 +254,7 @@ const struct List_Config* getListConfig(const char * listname)
     ListConfig = calloc(sizeof(struct List_Config), 1);
     if (ListConfig == NULL)
         {
-        syslog(LOG_ERR, "Failed to allocate %d byte of memory.", sizeof(struct List_Config));
+        syslog(LOG_ERR, "Failed to allocate memory for List_Config data structure.");
         exit(EXIT_FAILURE);
         }
     if (!strcasecmp(listtype, "open"))
diff --git a/rfcparse.c b/rfcparse.c
index 27fb420..f80f87a 100644
--- a/rfcparse.c
+++ b/rfcparse.c
@@ -211,7 +211,7 @@ ParseMail(struct Mail **result, char * incoming_mail, const char * fqdn)
 
     MailStruct = calloc(sizeof(struct Mail), 1);
     if (MailStruct == NULL) {
-        syslog(LOG_ERR, "Failed to allocate %d byte of memory.", sizeof(struct Mail));
+        syslog(LOG_ERR, "Failed to allocate memory for Mail data structure.");
         return -1;
     }
 
@@ -220,7 +220,7 @@ ParseMail(struct Mail **result, char * incoming_mail, const char * fqdn)
 
     MailStruct->Header = strdup(incoming_mail);
     if (MailStruct->Header == NULL) {
-        syslog(LOG_ERR, "Failed to allocate %d byte of memory.", strlen(incoming_mail));
+        syslog(LOG_ERR, "Failed to allocate memory for the incoming mail.");
         return -1;
     }
     for (MailStruct->Body = MailStruct->Header;