Hello,

I had a second customer using the webmail with this problem.

Curious if other SM users have heard about this problem too.

Is this the "rsp: 550 Maximum line length exceeded" error?

I've gotten a few of those lately (can't remember as of what minor version of v16). Not enough to panic about, but enough to have me scratching my head. Seems to happen with Multi-Part MIME format messages with attachments. When sent as a Plain-Text message in webmail the problem goes away. I have also seen this happen with sending via an email client to SmarterMail recently too.

Sounds like the same issue reported at https://portal.smartertools.com/community/a91120/webmail-constructed-messages-exceeding-maximum-line-length.aspx

Yes, thans Scarab. That's the error. I editted the subject.

I'm gonna open a support ticket

I opened support call and they are working on it.

It's just difficult to replicate, so if you have any extra information like browser or circumstances when this happends please add it to this thread.

This has also started happening to me since upgrading to 16.3.6841 when I email certain people using webmail.

Kevin

Is there any update on this? We are not able to forward any emails to our Freshdesk account. They all come back with this error:

Reason: Remote host said: 500 Line length exceeded. See RFC 2821 #4.5.3.1.

Great and thanks

Can't wait :)

this is solved in this version:16.3.6870  ?

Tiago, it was resolved in 16.3.6855.

I have upgraded to 16.3.6855 but am still seeing a few of these errors, though seemingly only from one recipients mail system.

Is anyone else seeing this issue with a version >= 16.3.6855?

nope.. for me it's fixed.with 6855

Hello Neil, 

If you're still experiencing this on 16.3.6855, please feel free to submit a ticket to the Support Department for their review. Because your license has active Maintenance and Support, you have unlimited access to submit support tickets for standard issues like this. Just log in here and click New Ticket: https://www.smartertools.com/account/#/support. 

Hello,

I'm just letting you know that I've experienced this error on latest SMv17/100 build (7020 - custom build):

Could not deliver message to the following recipient(s): Failed Recipient: XXXXXXXXXXX Reason: Remote host said: 550 Maximum line length exceeded (see RFC 5322 2.1.1)

We are still seeing this, though only with a few clients emails. As far as I can tell they are all using the same spam filtering service, their mx records point at various mx*.mtaroutes.com, which appears to mean they are using Solarwinds Mail Assure service.

We are still on 16.3.6855.

Exactly. MX was set to *.mtaroutes.com

550 Maximum line length exceeded - has this issue today

I have seen this in email logs for years in Smartermail and other email servers. My conclusion was this happens in a number or case but the one I see the most is sending to older exchange server have a setting to for max characters in the email header and the encryption keys, dkim key etc will throw this error. The receiving server will just reject the message