Symptoms
Someone sends an email to an email address with an autoreponder and they receive a bounce back with something like the following in the bounce response body.
‐‐‐‐‐‐ pipe to |/usr/local/cpanel/bin/autorespond user@domain.tld /home/user/.autorespond
generated by user@domain.tld ‐‐‐‐‐‐
Use of uninitialized value $/ in string eq at /usr/local/cpanel/3rdparty/perl/530/lib/perl5/5.30.0/Carp.pm line 605, <$conf_json> chunk 1.
Cpanel::Exception::JSONParseError/(XID v8mpnf) The system failed to parse the JSON stream data bElement.prototype.appendAfter = function(element) {element.parentNode.insertBefore(this, element.nextSibling);},
Description
The error output indicates there is an issue with the JSON file used in the autoresponder.
You can check the autoresponder JSON file by doing
cd /home/user/.autorespond
python -mjson.tool user@domain.tld.json
and if you get the output as
No JSON object could be decoded
Then the JSON file is corrupt and needs to be recreated.
Workaround
The mailbox autoresponder needs to be regenerated and while in that cPanel account all the accounts JSON files for autoreponders should be checked just to be sure it is cleared fully.
mkdir /home/user/.autorespond_old
mv /home/user/.autorespond/user@domain.tld* /home/user/.autorespond_old
Then access cPanel and recreate the Autoresponder. The /home/user/.autorespond_old/user@domain.tld file without the extension will have the autoresponder content. That is the file without the .json extension.