Web Mail Maximum allowed file size is 50 MB
Change Email Attachment size or limit message size
Message size (22483734) is over limit (21995520) - cPanel PHP max upload size



Maximum allowed file size is 50 MB



whm / Server Configuration / Tweak Settings
cPanel PHP max upload size
default .


Home / Service Configuration / Exim Configuration Manager
Advanced Editor add additional configuration settings
message_size_limit
default .



25 ~ 50
standard .



15 MB
https://www.ilovepdf.com/compress_pdf


https://support.cpanel.net/hc/en-us/...ze-in-Webmail-
https://forums.cpanel.net/threads/ch...e-size.671045/