How to get delivery report emails php?

Send an email, how do I know that this letter was delivered? That this box exist?
March 12th 20 at 08:09
1 answer
March 12th 20 at 08:11
picture insert

or just logs to watch (less reliable)
Well, I'll put the picture and then what? - cristina commented on March 12th 20 at 08:14
log pictures - Edyth_Dach commented on March 12th 20 at 08:17
@cristina, I mean the script specified in the src images, for its implementation can be tracked OPENED if somebody a letter, and not whether there is such a box(if you know what I mean). - Verlie.Brown39 commented on March 12th 20 at 08:20

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