Anyone have an easy way to sync invalid emails back from one of the mail checkers?

[eva2000]

I think the best way to do a benchmark or to check the results for email validation services is to compare the email addresses of an active board and compare:

The emails I tested some are from active board in the mix. Accuracy can also depend on email providers as they are getting more strict or using greylisting which can throw off accuracy https://en.wikipedia.org/wiki/Greylisting_(email) i.e. Yahoo has been a pain. And from my linked benchmarks, Emaillistverify was one of better ones for Yahoo and can log status verification as antispam too. I've long ago banned Yahoo from my forums anyway because of this, so no problems for me at least

Greylisting is a method of defending e-mail users against spam. A mail transfer agent (MTA) using greylisting will "temporarily reject" any email from a sender it does not recognize. If the mail is legitimate, the originating server will try again after a delay, and if sufficient time has elapsed, the email will be accepted.

So some of the soft bounces could be due to grey listing

Emaillistverify and greylisting https://api.emaillistverify.com/api-doc

Verification quality​

This feature is currently exclusive to bulk email verifications and is designed to reduce the occurrence of antispam_system, smtp_protocol, and unknown statuses. It reflects the level of verification accuracy for each email within the list. The available options are as follows:

• Standard: Represents our traditional verification quality, known for its quick and reliable results. Priced at 1 credit per email, the standard process includes multiple retry attempts from different IP addresses if encountering the specified statuses or unexpected errors.
• High: Introduces our advanced verification method, priced at 2 credits per email. This option offers twice the retries from varied IP addresses, which may lead to a slower verification process in extreme cases. However, it significantly reduces the likelihood of encountering the mentioned states. Additionally, the high-quality verification includes a new feature implementing greylisting, a proven anti-spam measure. Greylisting involves temporarily rejecting emails from certain senders, later allowing them through after a delay. In such instances, our system retries verification multiple times with varying delays, with a maximum delay of 30 minutes. While this may postpone the verification process for the entire email list by up to 30 minutes, it substantially increases the chances of converting antispam_system responses to ok or email_disabled statuses.

specific

• High: Introduces our advanced verification method, priced at 2 credits per email. This option offers twice the retries from varied IP addresses, which may lead to a slower verification process in extreme cases. However, it significantly reduces the likelihood of encountering the mentioned states. Additionally, the high-quality verification includes a new feature implementing greylisting, a proven anti-spam measure. Greylisting involves temporarily rejecting emails from certain senders, later allowing them through after a delay. In such instances, our system retries verification multiple times with varying delays, with a maximum delay of 30 minutes. While this may postpone the verification process for the entire email list by up to 30 minutes, it substantially increases the chances of converting antispam_system responses to ok or email_disabled statuses.

So for your emails, separate yahoo and probably hotmail to separate verification lists from other email domain providers for verification

 

[DragonByte Tech]

Others I tested at https://github.com/centminmod/validate-emails with benchmarks

No niin, looks like I have a few other APIs to add

 

[DragonByte Tech]

I excluded two of the ones on that list that didn't have publicly accessible docs, and Poofy or whatever it was had a website so atrociously bad I'm not going to drive any business to them

Working on the others.

 

[eva2000]

I excluded two of the ones on that list that didn't have publicly accessible docs, and Poofy or whatever it was had a website so atrociously bad I'm not going to drive any business to them

Working on the others.

Yeah, some have very bad documentation!

 

[DragonByte Tech]

Update:

• CaptainVerify can't be tested because their registration form requires a phone number, and I'm not going to give them that information.
• MyEmailVerifier can't be tested because their registration form does not accept my email address - which doesn't bode well for their accuracy as a email verification service...
• ZeroBounce, Reoon and Bouncify I was able to test