Getting "InvalidParameterValue - Missing final '@domain'" from Amazon SES while sending an email with unicode characters in destination address

Question

Amazon SES returns the error mentioned above when i try to send an email that contains unicode characters in the To: field. Amazon SES Documentation says that such email addresses should be sent in MIME encoded-word syntax, which the mail gem (used by ActionMailer) is doing correctly, it is sent as: =?UTF-8?B?dmluYXl2aW5heeKAmXNAbWFpbGluYXRvci5jb20=?=

Groscr

Resolved my issue, I included 'no-reply@domain-name' or 'admin@domain' instead of solely using the domain name. – Pedagogue

Answer 1

I was seeing this same error, and found it was due to an incorrect ReturnPath parameter. The error indicates your ReturnPath parameter does not have a domain name. The ReturnPath parameter should be an email address, and it's the address to which bounce notifications are forwarded.

Albertalberta

Populating ReturnPath parameter didn't fix it for me. Must be something else. – Crone

Answer 2

The question is pretty old, but I'll add my case for it seems to be the first result searching for problems with "Missing finale @domain" on AWS SES.

(the only other SO question I found is AWS SES Missing final '@domain' PHP SDK )

As in the other question's answer, InvalidParameterValue is returned every time a parameter don't pass validation.

In my case I was using boto3 on python, composing the Destination parameter with some keys that could be empty, like so:

to = []
bcc = []
# Some code to populate one or both lists..
response = client.send_email(
        Destination={
            'ToAddresses': to,
            'BccAddresses': bcc
        },
        Message={
            'Body': {
                'Html': {
                    'Charset': MAIL_CHARSET,
                    'Data': message,
                },
                'Text': {
                    'Charset': MAIL_CHARSET,
                    'Data': message,
                },
            },
            'Subject': {
                'Charset': MAIL_CHARSET,
                'Data': subject,
            },
        },
        Source=MAIL_SENDER,
    )

If one of the two keys in the dict assigned to the Destination parameter was an empty list the InvalidParameterValue was returned. Solution is to simply remove empty, useless, key:

to = []
bcc = []
# Some code to populate one or both lists..
destinations = {
            'ToAddresses': to,
            'BccAddresses': bcc
        }
response = client.send_email(
        Destination={typ: addresses
                     for typ, addresses in destinations.iteritems()
                     if addresses},
        Message={
            'Body': {
                'Html': {
                    'Charset': MAIL_CHARSET,
                    'Data': message,
                },
                'Text': {
                    'Charset': MAIL_CHARSET,
                    'Data': message,
                },
            },
            'Subject': {
                'Charset': MAIL_CHARSET,
                'Data': subject,
            },
        },
        Source=MAIL_SENDER,
    )

Mu

Thank you! This ended up helping me find the source of my own similar problem. Though in my case, I was accidentally quoting the Reply-To header's email value, e.g. Reply-To:"[email protected]", which should be Reply-To:[email protected]. – Bluing

Interesting... we just started getting this error. In code that has worked for years, we had a line copied form the AWS example: ReplyToAddresses: [ /* more items */ ] Is it possible that AWS has added a check for the value being legit and is it now required? – Coinsurance

Answer 3

I was getting this error when using the SES SendRawEmail API because my entire "To" header was being encoded in MIME encoded-words syntax as a unit.

It's not completely clear from the documentation, but it hints that the sender name should be encoded separately.

The sender name (also known as the friendly name) may contain non-ASCII characters. These characters must be encoded using MIME encoded-word syntax, as described in RFC 2047. MIME encoded-word syntax uses the following form: =?charset?encoding?encoded-text?=.

source: https://docs.aws.amazon.com/ses/latest/APIReference/API_SendRawEmail.html#:~:text=The%20sender%20name,encoded%2Dtext%3F%3D.

Python's email.message.Message class automatically encodes headers containing non-ascii characters as a single chunk:

from email.message import Message

message1 = Message()
message1["To"] = "Recipiént <[email protected]>"
print(message1.as_string())
# To: =?utf-8?b?UmVjaXBpw6ludCA8Zm9vQGJhci5jb20+?=

I worked around this by formatting the address in advance using the formataddr utility function, which does the encoding for the sender name separately:

from email.utils import formataddr

message2 = Message()
message2["To"] = formataddr(("Recipiént", "[email protected]"))
print(message2.as_string())
# To: =?utf-8?q?Recipi=C3=A9nt?= <[email protected]>

Pinfeather

Answer 4

I just got this error because I was storing email addresses in a .cfg file (which uses the same structure as a Windows .ini file) and I put quotes around the email address like programmers are in the habit of doing with strings but that you shouldn't do in a cfg file:

[email_settings]
email_to="[email protected]"

When I removed the quotes, it worked. I'm sure there are multiple issues that can cause this error.

Randallrandan

Answer 5

I think this error might have occurred for different reasons. So it might be possible that there may be case-specific reasons, and one solution might not work every time.

I'm using the @aws-sdk/client-ses JS SDK. In my case, I was facing it while providing an address as an empty string, null, or undefined.

Animate