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[Mailer] Capitalize sender header for Mailgun#52017
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svendecabooter commentedOct 12, 2023
This fixes the issue I reported for me. |
0035d17 toeb394bbCompareMember
nicolas-grekas commentedOct 12, 2023
Thank you@Romanavr. |
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This fix resolves the duplicate header issue.
Without a fix, using API & HTTP transport type, emails could leave with double headers, causing problems for some email providers, for example, the problem was reproduced with Gmail:
5.7.1 This message is not RFC 5322 compliant. There are multiple Sender 5.7.1 headers. To reduce the amount of spam sent to Gmail, this message has 5.7.1 been blocked.Moreover, I found that changes to HTTP transport type were not necessary since this problem could be solved by simply adding a sender, so I reverted everything for HTTP transport type.