Title: Incorrect authentication data
Last modified: May 2, 2022

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# Incorrect authentication data

 *  Resolved [johnm243](https://wordpress.org/support/users/johnm243/)
 * (@johnm243)
 * [4 years ago](https://wordpress.org/support/topic/incorrect-authentication-data-14/)
 * Re “Incorrect authentication data” error, I found this:
    [https://postmansmtp.com/incorrect-authentication-data/](https://postmansmtp.com/incorrect-authentication-data/)
 * [https://postmansmtp.com/incorrect-authentication-data/](https://postmansmtp.com/incorrect-authentication-data/)
 * This is what I have done:
 * 1. Verified DNS. TXT record is OK:
    v=spf1 ip4:IP-Address-of-Server include:spf.
   protection.outlook.com -all
 * 2. CPanel > Tweak Settings > All: searched CPanel and no Tweak Settings is available
 * 3. CpHulk is not enabled.
 * 4. I use SendGrid. I verified that the IP-Address-of-Server is in the SendGrid
   IP Address allow list. Yes, it is there.
 * Other ideas on how to get rid of this error message?`
 * Thanks,
 * John

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Support [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [4 years ago](https://wordpress.org/support/topic/incorrect-authentication-data-14/#post-15614636)
 * [@johnm243](https://wordpress.org/support/users/johnm243/) Hi,
 * did you try to change SendGrid settings?
 * Try to change the mailer type normally this type of issue is because of hosting
   or there is an issue in the mailer service, try to talk to hosting support or
   send grid support about this ?
 *  Thread Starter [johnm243](https://wordpress.org/support/users/johnm243/)
 * (@johnm243)
 * [4 years ago](https://wordpress.org/support/topic/incorrect-authentication-data-14/#post-15615321)
 * Thanks [@haseeb0001](https://wordpress.org/support/users/haseeb0001/).
 * No Sendgrid settings were changed. And Sendgrid support is not much help: when
   I had an issue configuring Sendgrid at the beginning, I heard back from Sendgrid
   support AFTER I received a helpful response from a tech site!
 * When you say “Try to change the mailer type”, can you please explain?
 * I can also ask hosting support, but will wait until I hear back from you.
 * Thanks again,
 * John
 *  Plugin Support [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [4 years ago](https://wordpress.org/support/topic/incorrect-authentication-data-14/#post-15617581)
 * Hi [@johnm243](https://wordpress.org/support/users/johnm243/)
 * Check the screehshot **[here.](https://www.awesomescreenshot.com/image/26700326?key=13c24e9529d3b1ca41f93987819d7791)**
 * You can try to change the mailer type and test it.
 * Share the Diagnostic test report here.
 * Share “Send a Test Email” logs here.
 * Thanks
 *  Plugin Support [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [3 years, 11 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-14/#post-15736409)
 * [@johnm243](https://wordpress.org/support/users/johnm243/)
 * We haven’t heard from you so we’re going to mark this thread as resolved. Feel
   free to open a new one if you need it.
 * Thanks

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Incorrect authentication data’ is closed to new replies.

 * ![](https://ps.w.org/post-smtp/assets/icon-128x128.gif?rev=3209655)
 * [Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App](https://wordpress.org/plugins/post-smtp/)
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 * 4 replies
 * 2 participants
 * Last reply from: [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * Last activity: [3 years, 11 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-14/#post-15736409)
 * Status: resolved