SMTP Not Working

  • Resolved socialbear

    (@socialbear)


    10 months ago

    Versions:
    WordPress: 6.8.2
    WordPress MS: No
    PHP: 8.2.27
    WP Mail SMTP: 4.5.0

    Params:
    Mailer: smtp
    Constants: No
    ErrorInfo: SMTP Error: The following recipients failed: [email protected]: : Sender address rejected: not owned by user [email protected]
    Host: smtp.hostinger.com
    Port: 465
    SMTPSecure:    ssl
    SMTPAutoTLS:bool(true)
    SMTPAuth:bool(true)

    Server:
    OpenSSL: OpenSSL 1.1.1w 11 Sep 2023
    Apache.mod_security: No

    Debug:
    Email Source: WP Mail SMTP Mailer: Other SMTP PHPMailer was able to connect to SMTP server but failed while trying to send an email.
    Email Source: WP Mail SMTP Mailer: Other SMTP SMTP Error: The following recipients failed: [email protected]: : Sender address rejected: not owned by user [email protected]

    SMTP Debug:
    2025-08-15 07:36:08 Connection: opening to ssl://smtp.hostinger.com:465, timeout=30, options=array()
    2025-08-15 07:36:09 Connection: opened
    2025-08-15 07:36:09 SERVER -> CLIENT: 220 ESMTP smtp.hostinger.com
    2025-08-15 07:36:09 CLIENT -> SERVER: EHLO superfluousmart.com
    2025-08-15 07:36:09 SERVER -> CLIENT: 250-smtp.hostinger.com250-PIPELINING250-SIZE 48811212250-ETRN250-AUTH PLAIN LOGIN250-ENHANCEDSTATUSCODES250-8BITMIME250-DSN250 CHUNKING
    2025-08-15 07:36:09 CLIENT -> SERVER: AUTH LOGIN
    2025-08-15 07:36:09 SERVER -> CLIENT: 334 VXNlcm5hbWU6
    2025-08-15 07:36:09 CLIENT -> SERVER: [credentials hidden]
    2025-08-15 07:36:09 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
    2025-08-15 07:36:09 CLIENT -> SERVER: [credentials hidden]
    2025-08-15 07:36:09 SERVER -> CLIENT: 235 2.7.0 Authentication successful
    2025-08-15 07:36:09 CLIENT -> SERVER: MAIL FROM:<[email protected]>
    2025-08-15 07:36:09 SERVER -> CLIENT: 250 2.1.0 Ok
    2025-08-15 07:36:09 CLIENT -> SERVER: RCPT TO:<[email protected]>
    2025-08-15 07:36:10 SERVER -> CLIENT: 553 5.7.1 <[email protected]>: Sender address rejected: not owned by user [email protected]
    2025-08-15 07:36:10 SMTP ERROR: RCPT TO command failed: 553 5.7.1 <[email protected]>: Sender address rejected: not owned by user [email protected]
    2025-08-15 07:36:10 CLIENT -> SERVER: QUIT
    2025-08-15 07:36:10 SERVER -> CLIENT: 221 2.0.0 Bye
    2025-08-15 07:36:10 Connection: closed
    SMTP Error: The following recipients failed: [email protected]: <[email protected]>: Sender address rejected: not owned by user [email protected]

    I changed password for [email protected]
    Also reconnected hostinger server but didn't work. Check this all

    The page I need help with: [log in to see the link]

Viewing 1 replies (of 1 total)
  • Plugin Support Patrick

    (@paddyam)

    9 months, 2 weeks ago

    Hey @socialbear,

    Thanks for reaching out to us and sorry to hear about the challenge with the SMTP connection.

    You’re seeing this because Hostinger won’t let you send as [email protected] when you’ve authenticated as [email protected]. The SMTP server is rejecting the “From Email” address.

    To fix it, could you please try one of these:

    1. In WP Mail SMTP → Settings, change From Email to [email protected] (then save and send a test).
    2. In your Hostinger control panel (or via Hostinger support), add/verify [email protected] as an authorized sender.

    If you’d rather avoid SMTP restrictions, switch to a transactional mailer (API-based) like SendLayer, Brevo (formerly Sendinblue), SMTP.com, SendGrid, or Mailgun.

    Kind regards.

Viewing 1 replies (of 1 total)

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