I am unable to send photos

Whenever I try to send photos in any methods known to me I get the familiar "

unknown error

server SMTP ** Suddenlink,net

unknown error **  0x8007007a

protocol ** SMTP

port 25

secure ssl **  NO

I have tried to send thru one drive, as attachments, thru Photo Gallery, My Pictures etc.  and every other way but the message remains the same, and it is with one picture or multiples. I have never had this problem before with this operating system, windows 7, windows live mail 2012. I have asked my computer store, my server (suddenlink) to no avail????

I have changed NOTHING from previous settings or added any other programs, it just happens *&^&^%$

And how can it be an "unknown error" when they can give me a code ## for it ????????? Why has Microsoft not addressed this ??

Any help out there

Thanks

BV

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