Repeated headers in wp_mail

You use an index in your $header variable. AFAIK this should be left empty.

Try $headers[] = trim( $content );

Related Posts:

  1. Postman: wp_mail has been declared by another plugin or theme
  2. Using wp_mail with attachments but no attachments received
  3. How to send an email using wp_mail and using more than one BCC in the header
  4. Check to check if wp_mail is working properly?
  5. Multiple email recipient using wp_mail()
  6. Adding an Attachment to Contact Form Using wp_mail
  7. Using wp_mail() – verify that email was sent?
  8. Email reply to multiple email addresses not working
  9. wp_mail line break not working
  10. Add multiple recipients via BCC on wp_mail()
  11. Change Default wp_mail From, Without Affecting Gravity Forms
  12. How to use ‘phpmailer_init’ SMTP settings only on certain ‘wp_mail’ actions?
  13. Send automatic emails to multiple user roles when a custom field is updated in a custom post type
  14. Can you set envelope sender used by wp_mail?
  15. Do I have to override the wp_mail() pluggable function with writing a plugin?
  16. Using wp_mail() function outside of WordPress and through PHP CLI
  17. Unexpected = (equal sign) characters in wp mail
  18. wp_mail isn’t making the from header correctly
  19. How to stop the wp_mail function?
  20. Sending HTML email with attachment with wp_mail()
  21. Need clarification on how to correctly call wp_mail()
  22. WordPress wp_mail() how to add a .GIF
  23. wp_mail() sends wrong From header
  24. Remove from “WordPress” when reciving email (Should I remove filter?)
  25. Using wp_schedule_event to send emails including links
  26. Add a hook to wp_mail() to track Google Analytics Event
  27. Email all subscribers when i do an action
  28. wp_mail is sending two emails when used after retrieving session data
  29. How Can I Change Default Reply ToEmail
  30. How do I set wp_mail arguments/manually force wp_mail sending based on the sender’s email address?
  31. How to restrict sending email twice in wp_mail
  32. Restrict current user from receiving email using wp_mail
  33. Mask Sender Address in wp_mail() in WordPress [closed]
  34. wp_mail is not sending email if I pass an array of emails
  35. wp_mail: An array as $to – multiple emails or single email with all the email ids in it?
  36. How to send bulk messages using wp mail function?
  37. how to send an email with wp_mail with an image on the email body
  38. Unable to send custom welcome email after user register
  39. test email is working but not sending email with wp mail [closed]
  40. wp_mail attachment woes!
  41. wp_mail() inside AJAX handler never returns
  42. wp_mail not sending when attachment
  43. How can I replace Email addresses with BitMessage Addresses througout wordpress?
  44. Trying to get author’email for sending email from single.php page in wordpress?
  45. wp_mail not sending in test php file
  46. wp_mail not sending emails
  47. wp_mail sending mail twice!
  48. Using WP_Mail on MacOS 12 (Monterey – M1) [closed]
  49. wp_mail sending old content from post
  50. If/elseif statement within wp_mail function
  51. Sending mails with wp_mail() to multiple recipients using wp_cron and dynamic email body data
  52. WordPress wp_mail function not working, returns false
  53. Prevent sending emails on user creation in OOP context?
  54. How to send multiple email to different addresses
  55. How to send language string in email message body
  56. Wp_Mail and Contact Form 7
  57. wp_mail strips out the link url from the anchor tag in mail content
  58. wp_mail – using a custom field value for $to
  59. How to disable wp_mail for all users except for admins?
  60. How to send email from contact page without using a plugin
  61. wp_mail ignores the name in From field
  62. wp_mail encode ’ in ’ in subject
  63. wp_mail issue with sending PDF
  64. Wp_mail() function not working in Windows and MAC OS
  65. wp_mail BCC admin
  66. Problem using wp_mail function
  67. Using SMTP Function instead of Plugin (functions.php)
  68. WordPress doesn’t work properly with non standard domain names – PHPMailer fails when initialising
  69. Using two different outgoing email services, can it be done?
  70. WordPress wp_mail function crashing website
  71. wp_mail only sends emails to gmail
  72. How to send a particular csv file as an email?
  73. Sending bulk mail to a certain number of users
  74. Send a email base on a taxonomy term
  75. Contact form with file upload
  76. WP Mail plugin not sending the mail
  77. Mail not working on WordPress site
  78. Include content post WordPress – Email notification
  79. Email me when front posting or update post
  80. wp_mail sends email twice inside function updated_postmeta
  81. wp mail smtp earlier version
  82. How to use Contact Form 7 to handle the server side mail() only?
  83. wp_mail sending emails in triplicate
  84. adding Recipient to wp_email() is not working?
  85. If I connect my own SMTP server to wp_mail, reset password doesn’t works anymore
  86. How to make mailing queue using php’s mail() function
  87. Change Password URL missing In forgot Password mail
  88. Using wp_mail in functions.php
  89. wp_mail() function doesn’t send email in Ajax mode
  90. wp_mail: Using file_get_contents to include template in message
  91. WP – not sending email
  92. Why does WordPress not send password reset emails from the Administrator Address?
  93. Cc header in wp_mail() not working
  94. Different wp_mail_from and wp_mail_from_name for specific situations
  95. wp_mail() is not working in localhost
  96. What is the best way to send out thousands of emails from a WordPress site? [closed]
  97. Different SMTP based on domain
  98. Condition within single.php to send an email to the post author
  99. How to send automatic response after form submission without plugin
  100. is_tax not working for custom taxonomy