PHPMailer - Get errors by recipient - phpmailer

I am using PHPMailer 6.6.5 and I am sending email to one recipient with multiple CC.
Some of these recipients are using an invalid email address, so the smtp server returns an error and PHPMailer is processing these as Exception. But the email was sent successfully to the recipients that was valid.
We need to identify when an error occurs which recipients will receive the email and which wont, please.

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Nodemailer is not sending the email

I am using Nodemailer to send the email to user. But the user is not receiving the email. And I am using etheral mail in Nodemailer. It shows that(In Provided Image) the email is successfully sent but the user is not receiving the email in his Account . I have tried with with gmail, outlook mail as well as with temp mail but the email wasn't received in any of them.
Image showing the sended mails

Sending email from any provider to a fixed address

I have a contact form where the sender could be from gmail, outlook or any other provider and the receiver is always the same.
How can I send email in this case?
I need to switch params based on the sender's provider or I can send without them?
Nodemailer auto-detect provider from the address or I need to specify it in the smtp transport?
UPDATE: Is there a different solution than nodemailer?
I'm expecting to receive email from any kind of address fulfilling the contact form.

Getting a response of 202 while sending email via SendGrid but no activity in sendgrid dashborad neither I am recieving mail in inbox

I am using SendGrid to send email via sendgrid API. I get a response code of 202 but there is no activity on my sendgrid dashboard and I am not recieving the email which i just sent. I already checkd in Spam section.
My Javascript code here
Response I am getting
I have already verifed my signup email and sender email.
Not recieving my email.

Get original email headers of forwarded email using domain-wide-delegation

We have all spam and phishing emails being forwarded to an IT department for review. We currently have individuals downloading the original email in their gmail inbox and then attaching it to an email to the spam box. This has caused a lot of complaints from less technical users.
I am trying to build a python script that can read forwarded emails and then use domain wide delegation to access their email boxes and retrieve the original headers of the forwarded message.
Do any of the fields in the gmail headers stay constant when forwarding an email so that a forwarded email can be used to query the original email in a users inbox ?
The current method that I have tried reads the message ID's of the spam box, retrieves the message, identifies the sender and messageID's of the messages in the spam box and then uses domain-wide-delegation to query the mailbox of the sender for the original message. This fails however as Gmail messageID's and threadID's of the forwarded emails don't match the original email.

Resend Envelope using Docusign not working- user not receiving the email

I am trying to re-send the envelope to Recipient through docusign API, but user is never receiving the email
URI - https://na2.docusign.net/restapi/v2/accounts//envelopes//recipients
The post is successful, i get a success message but user never receives a email.
There is no correction required. Its a reminder email, i know in the account there is a setting to send the reminder, but i am using nintex "send docusign document" activity to send the email to the user initially. So the default docusign reminder is not working and i using the api to send reminder.Any help???
Use the "resend_envelope=true" query string parameter.
PUT
https://{{env}}.docusign.net/restapi/v2/accounts/{{accountId}}/envelopes/{{envelopeId}}/recipients?resend_envelope=true
Answer already provided here.

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