[Mailer] Fix attachments and embedded images for Mailchimp API#33996
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michaelperrin wants to merge 1 commit intosymfony:4.3from
Closed
[Mailer] Fix attachments and embedded images for Mailchimp API#33996michaelperrin wants to merge 1 commit intosymfony:4.3from
michaelperrin wants to merge 1 commit intosymfony:4.3from