delete strings till specific string

Shell Programming and Scripting
1

Hello
i want to know a way so i can delete all the strings in file from the begning till a specific string

2

One way with awk, the slashes are escaped and the quote is replaced with the octal number 047:

awk '
/* MAILBOX \047\/mboxes\/4\/162\/123\/600004903@orange.es\// {p=1;next}
p' file > newfile