554 validating sender

You must complete the verification process for each sender in the AWS region(s) you want to use.

554 validating sender-28554 validating sender-56

This error message is issued if the domain address given in the EHLO command does not have the correct syntax.

This error message is issued if the domain address given in the HELO command does not have the correct syntax.

Your email-sending application did not attempt to authenticate with Amazon SES when it tried to connect to the Amazon SES SMTP interface.

For an example of how to set up an email-sending application to authenticate with Amazon SES, see Configuring Email Clients to Send Through Amazon SES.

This error could apply to the "From", "Source", "Sender", or "Return-Path" address.

If your account is still in the sandbox, you also must verify every recipient email address except for the recipients provided by the Amazon SES mailbox simulator.After it has done this, a transaction is started which is not finished before the entire message has been delivered to the email server.If the client wishes to abort the transaction and send another message, it should issue the RSET command.If a client, in the middle of a transaction, tries to send a new email without first aborting the current transaction, h Mail Server issues this error message. When a SMTP client is delivering an email to a SMTP server, it must specify both the sender and recipient before trying to submit the actual message content.If a client fails to tell h Mail Server the senders or recipients address prior to trying to submit the message content, h Mail Server will respond with this error. When a SMTP client is delivering an email to a SMTP server, it must specify both the sender and recipient before trying to submit the actual message content.If the third retry call does not succeed, perform another set of retries after 20 minutes.

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