server error 452 4.5.3 too many recipients

Question

_{Thursday, December 4, 2014 1:00 PM}

friends .. i read most of the answered thread and really not happening.. i am getting too many recipitnts error when my client is doing a mass mailing... they using mail merge... they have account configured as POP. send as permission is given and they are authenticating using a different accounts.

Its like mass mailing is done from USER-X account but on outlook, client has configured user-X as a pop account and primary account is USER-YY and for mass mailing mail-merge is used.

getting error about too many recepients. checked on server limits is 10000 users are around 700 coming from mail-merge.

exchange 2013 latest. Please advise this is very urgent.

Mark as useful or answered if my replies helped you solving your query.
Thanks, Happiness Always
Jatin
Skype: jatider2jatin, Email: jatinder2jatin@yahoo.ca

All replies (2)

_{Thursday, December 4, 2014 1:37 PM ✅Answered}

Hi Jatin ,

First of all i am very happy to help you.I hope you could have checked the below parameters anyhow please check the below parameters.

1.Get-TransportConfig | fl *limit*

Parameter name : MaxRecipientEnvelopeLimit

2.On the receive connectors please check these values also.

MaxRecipientsPerMessage

MessageRateLimit

3.Same individual mailbox is also having the maximum recipients limit .

parameter name "RecipientLimits"

If you have set the specific  value in individual mailbox and that value overrides the value defined on the transport config

4.In one of the article , i have read that if we do a telnet against our mail server withe the EHLO command we can able to find out the maximum recipients limit on the verbs after the EHLO.

Note : In your case you are using pop protocol ,pop clients mails will be received by two receive connectors one is client receive connector in cas (port no:587)and another one receive connector listens on port no 465 and it will be on the mailbox server which will be use to receive the proxied connections from the client receive connector.

You can also check the below parameters on those two connectors.

MaxRecipientsPerMessage

MessageRateLimit

Please feel free to reply me if you have any queries.

Thanks & Regards S.Nithyanandham

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_{Thursday, December 4, 2014 1:51 PM}

Hi ,

I have found that article and that is not about recipients limit and that is about the maximum message size that the server will accept it from client.

http://www.samlogic.net/articles/smtp-commands-reference.htm

Thanks & Regards S.Nithyanandham