Sorry,Please find below details:Mail Sending: phpMail functions or SMTP :- SMTPMail Fetching/Receiving: IMAP or POP and Server version :- For email fetching we are using IMAP,PHP version :- PHP 7.2.4Operating System :- CentOS Linux release 7.4.1708 (Core)Client or Staff side of the UI :- Windows 7/ Windows 10the location - the url or what your clicking on that is causing the problem. :- A file which is attached with the reply.
Also, is there anyway of attaching the files which are more than 2 MB, like 18 MB.