PHPMailer library can be installed via Composer or manually. Gmail SMTP server requires 2-Step-Verification enabled. App password may be needed for security
PDFs maintain original formatting and work across all operating systems. UPDF offers PDF editing, annotation, conversion, and protection features. PDFs can be shared via email, text messaging, or social media
Contact group is a list of people or email addresses for bulk email sending. No additional add-in or service required. Available in Outlook 2016, 2019, and newer versions
Error 501 indicates server doesn't recognize request method or parameters. Error 510 shows invalid or misspelled email addresses. Error 513 indicates incorrect address syntax or typos. Error 515 occurs when destination mailbox address doesn't exist. Error 530 requires authentication due to server configuration issues
Error occurs when email delivery fails due to temporary server problems. Exceeding messaging limits can trigger the error message. DNS issues and MX record configuration problems may cause delivery failures. Spamassassin and ClamAV services can trigger the error. Outlook corruption can cause error code 0x800CCC6A
World's most popular PHP email sending library. Supports multiple email addresses and attachments. Includes SMTP authentication with various mechanisms. Provides automatic email address validation. Offers error messages in over 50 languages