[Mailer] Fix Trying to access array offset on value of type null
error by adding null checking
#60057
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Trying to access array offset on value of type null
error by adding null checkingIts a very simple bug fix.. basically the

error_get_last()
doesn't have the 'message' and causing this issue:so i just added Null Checking and it seems to be working now:

this is happens when using Mailtrap and when it reaches its quota..