“Invalid mailbox syntax” with valid mailbox syntax

Because the email-562 isn’t a required field so it can be empty. Make it email*.

I’m having the same problem, even when email* is used. Under additional headers, I have:

Reply-To: [EMAIL*] <[email protected]>

However, when replying to an email, it LOOKS like it will be sent to the EMAIL*, but it actually sends to [email protected] which is not a valid email.

Setting “Reply-To: [EMAIL*] <EMAIL*>” gives me the invalid syntax error. Removing <EMAIL*> gives me the invalid syntax error. The only thing that does NOT give me the invalid syntax error is “[EMAIL*] <[email protected]>” but that does not actually allow me to respond to emails. How can I fix this? Or do I have to find a different plugin?

I see that many other people are waiting for an answer to this. Do you have any helpful information or will I have to pick another plugin?

I also faced this error.
But i found that solution that, CF7 already reserved some variable tag for their form control.
such as [type name] [type email] etc.
Thus why, when you assign your variable value with like that you will see error message & may not work properly.
so please avoid using the generic variable tag in your form control.
if you want to get First Name, Last Name & Email you should assign like that
[text* fname]
[text* lname]
[email* visitoremail]

Thanks, changing from [text] to [email] worked ??

• This reply was modified 6 years, 2 months ago by Glitch Guards.

hi, I’m extremely new to wordpress and I’m having trouble with the “From” portion of my contact form. I tried [email* your-email], [your-email], [email* visitoremail], and many others, but I keep getting an “invalid mailbox syntax error”.

@carolinealices – in your “Form” part you should have following tag: [email* your-email] and in Additional Headers you should have Reply-To:<[your-email]>

Hey guys, wondering if anyone found a solution?
I am also getting this error under Additional Header and have tried multiple tags:

Reply-To:<[your-email]>
Reply-To: [email* your-email]
Reply-To: [email* visitoremail]

All do not work and give syntax error, any advice?
Thanks!

@beckhall what is the name of your email field? Is it your-email? If not, change it to that. If it is, post somewhere screenshot of your form settings.

Hi Lorinc,
Here is the default coding that was in my form:

<div class=”column-1_2″>[email* email placeholder “Your Email”]</div>

OK. So it doesn’t work because your input name is “email” but in Additional Header you requested “your-email”. They both need to be the same.

I’ve got [email* your-email] in the From field, exactly like the help page says, and it still tells me “Invalid mailbox syntax is used.”

Is this something that could’ve been caused by the recent WordPress update, and if so, is there a known fix for it yet?

@takayukister , @lorinc , any ideas?

Hi Lorinc,
I have tried to change settings as you suggested although still getting error:
Form Code: [text* your-email placeholder “Email*”]
Additional Headers: Reply-To: [email* your-email] – Error
Reply-To: [email* Email*] – Error
Reply-To: [email* “Email*”] – Error

What would i need to change this to?

Thanks!