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Home/ Questions/Q 6048943
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Editorial Team
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Editorial Team
Asked: May 23, 20262026-05-23T07:31:12+00:00 2026-05-23T07:31:12+00:00

Swiftmailer seems to default to crammd5 for SMTP authentication which is great but we

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Swiftmailer seems to default to crammd5 for SMTP authentication which is great but we have an SMTP server that requires PLAIN authentication (over SSL) and I can’t seem to find a way in 4.x to set which authentication method to use. Apparently it was possible in 3.x but I can’t find a way to do it in 4.x. I see there is a plain auth class but I’ve looked through the code and can’t find a way to set it. Any help would be greatly appreciated.

Cheers,

Dan

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  1. Editorial Team
    Editorial Team
    2026-05-23T07:31:12+00:00Added an answer on May 23, 2026 at 7:31 am

    The answer was provided to me at: http://groups.google.com/group/swiftmailer/browse_thread/thread/422a409989c8acf1

    $transport->setAuthMode('PLAIN'); 
    
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