fixing minor issue with out Cloud (digitalocean)

our cloud has been rented from Degital ocean and has ubuntu OS. 1GB Ram 1 CPU We will issue Full milestone before start working and will NOT release Before finishing all tasks! If you accept please bid! this cloud has 2 websites: [login to view URL] : it use node.js [login to view URL]: it is based on wordpress and has whmcs installed on it. WHMCS works based on Cron. so after updating the Php and others things, to make sure that all the functions of WHMCS is working good like before updating. The tasks: 1. check why the IP of the cloud is showing on the home page of the [login to view URL] 2. install the new version of php (WHNMCS needs version higher than PHP version 5.5.9-1ubuntu4.14) - WHMCS need ([login to view URL]) 3. update Installed cURL Version (currently have version 7.35.0 of cURL installed and need to update it as it has security issues) 4. increase the PHP used memory ([login to view URL]) 5. fix the sql to accept chines letters, arabic letters and Ukranian letters too. have to check both the server side and the database side. 6. after checking [login to view URL] website. it showed that we have some errors, we want to solve all of them for bothwebsite. like: SOA Serial Number Format is Invalid SOA Expire Value out of recommended range Local NS list does not match Parent NS list Missing or Invalid Record 5.923 seconds - Warning on Connection time 7. Currently we are using the email service of our cloud ([login to view URL] to send and recive emails) we would like to use Mailgun service to send email and to recive emails using our own mail server. we have a problem as many of our client reported to us: 1. when they send email to us, it doesnt deliver. (when sending from private domain - hotmail and yahoo email are recivied without problems) 2. when we are sending email to any email under [login to view URL], we get bounce back. we think using of mailgun maybe will solve the issue. we installed the Mailgun before and were able to send using it. we had problem with reciving emails from mailgun when ending from billing at [login to view URL] to sales at [login to view URL] its not delivered using mailgun service. i have contacted mailgun support team and they provided me with the below asnwer The error that you are seeing is the result of sender address verification, and you can read more about it in the following link: [login to view URL] Essentially, this means the recipient domain is performing a check to make sure the sending address is valid. The following options will help you resolve this error: 1. Turn off sender address verification (this is server-side). 2. Add "x-mailgun-native-send: true" to the header of your message to turn off sender address rewriting. 3. Send from a subdomain of your domain. 4. Change the MX records to point to Mailgun instead. (Warning: do not do this unless you have a Route setup to route back to the internal server.) 5. Change the DKIM record to [login to view URL] instead of the custom DKIM record. (Warning: doing this may result in you seeing "sent via [login to view URL]") 6. Create a catch_all with the service where you receive email so that, when the recipient server checks, verification it will pass.