fixing several email delivery errors that occure after delivery from crm vtiger

I have several mail delivery errors, when i send emails through my crm vtiger.

I use a plugin for email campaigns in vtiger.

The reasons for the errors are different, e.g. the email address is no longer valid.

There are about 3300 email addresses in the crm.

The job is to do all steps to avoid or minimize further delivery problems,

e.g. control email addresses, control entries in spam-tools like spamhouse....

here are some examples of delivery errors:


[login to view URL]@[login to view URL]:

SMTP error from remote server for RCPT TO command, host: [login to view URL] ([login to view URL]) reason: 550 5.7.1 <[login to view URL]@[login to view URL]>: Recipient address rejected: Mail appear

ed to be SPAM or forged. Ask your Mail/DNS-Administrator to correct HE

LO and DNS MX settings or to get removed from DNSBLs; please relay via

your ISP ([login to view URL])


The mail system

<y383122@[login to view URL]>: host [login to view URL][[login to view URL]] said:

454 4.7.1 <y383122@[login to view URL]>: Relay access denied (in reply to RCPT TO



The mail system

<martl3000@[login to view URL]>: host [login to view URL][[login to view URL]] said: 421

4.7.0 [TSS04] Messages from [login to view URL] temporarily deferred due to user

complaints -; see

[login to view URL] (in reply to MAIL FROM



<www.aon.913265012@[login to view URL]>:

[login to view URL] does not like recipient.

track-id=1556877657:3496:smarthub83:[login to view URL]

Remote host said: 554 mailbox not found

Giving up on



Skills: CRM, Email Handling, PHP, Software Architecture, vTiger

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About the Employer:
( 46 reviews ) Irschenberg, Germany

Project ID: #20774615

10 freelancers are bidding on average $152 for this job


Hello, I'm interested in your project. Please send me a message so that we can discuss more. I prefer to submit my detailed proposal after our discussion. Thanks Seba

$250 USD in 7 days
(583 Reviews)

Hello, I'm CRM, vTiger expert, will do this with awesome front end design and 100% secure background calculation. I will be more than happy to help you. Let me share with you my expertise with CRM, vTiger development. More

$140 USD in 7 days
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Hi, I am Full stack developer having 6 years experience in technologies like Html 5, Css3, Bootstrap, JavaScript, jQuery, JS frameworks, Php, Laravel, WordPress. Let's have a quick conversation on the details to proce More

$140 USD in 7 days
(35 Reviews)

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$100 USD in 3 days
(84 Reviews)

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$66 USD in 1 day
(123 Reviews)

I saw your errors seems like it's not pretty much related to purely vtiger CRM. Few part depends on mail server which seems count on spam or black list. Can you share your url to check more. I am having experience in v More

$200 USD in 7 days
(11 Reviews)

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(2 Reviews)

Working on vtiger crm as erp since one [login to view URL] skill set in vtiger as below. Installation Vitger Module creation. Import and Export of excel report in different modules. Develope attendence system modules. Develop More

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(2 Reviews)

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$140 USD in 7 days
(4 Reviews)

Hello, My name is Janis and I have more than 5 years of experience in Email Marketing email delivery, deliverability. It looks like either your domain or IP/IPs are blacklisted or with a low reputation. Also, it's poss More

$130 USD in 5 days
(0 Reviews)