Your software
My Mautic version is: 2.15
My PHP version is: 7.0.33-0ubuntu0.16.04.12
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My problem is: I use Sendgrid with Mautic 2.15. Friday, I sent and received emails from Mautic and everything worked. Saturday I sent an email twice from different campaigns to my yahoo and Office 360 accounts. The emails were sent by Mautic at 4:00pm, then again at 7:45 pm. There is no record of the email in Sendgrid at 8:15pm. Please help! Thank you, Robin
backseat:
These errors are showing in the log: No errors show.
Steps I have tried to fix the problem: