Noiz Mail Limits and Behaviour

This page lists every limit built into Noiz Mail and what happens when one is reached, so that a result that looks short, a “busy” answer or a request to sign in again is never a surprise. Nothing here needs setting up; it is how the connector behaves for every connection.

Last reviewed: 4 November 2026, against the live Noiz Mail connector.

Searching and Reading

Limit	Value	What happens at the limit
Rows per search	1 to 100, default 25	The AI pages with offset for more
Paging in one folder	No limit
Paging across all folders (folder="*")	offset plus limit at most 1,000	Deeper paging is refused
Folders visited in an all-folders search	100, and no new folder after 60 seconds	The rest are counted in not_searched; Trash and Junk are never searched this way
Paging across all mailboxes (mailbox="*")	offset plus limit at most 500	Deeper paging is refused
Time for an all-mailboxes search	No new mailbox after 45 seconds	Mailboxes still waiting are listed in errors as not searched; the rest are returned
Folder count time	60 seconds	Counting stops; every folder is still listed
Message body	50,000 characters	The text is cut there and the result says so
Attachment size	5 MB	Larger attachments cannot be opened
Attachment types read as text	Plain text and PDF	Other types come back as base64 data; scanned PDFs, Office files and pictures may hold no readable text

Changing and Sending

Behaviour	Value
Moving mail	Only to a folder that already exists; trash, archive and junk name the mailbox’s own folders of that role
Deleting	Never permanent; “delete” moves to Trash
Creating folders	Not possible
Sender address	Always the signed-in address of the mailbox in use
Sent copy	Saved in Sent; if that fails the message still goes and the AI is told
Replies and forwards	Keep the original subject with “Re:” or “Fwd:”; a forward is plain text
Images in HTML mail	Embedded from an https address or a data URI; other sources are refused
Messages sent per hour or day	No connector limit; your mail server’s own outgoing limits apply
Recipients per message	No connector limit; your mail server’s own limits apply

Concurrency and the Mail Server

Limit	Value	What happens at the limit
Tool calls running at once per connection	4	A further call waits; if no slot frees within 30 seconds it is told the connection is busy and nothing is changed
Sessions held open per mailbox	4	Keeps the connector below your mail server’s own per-user limit
Waiting for a mail server session	30 seconds	The call is told “The mail server is busy right now. Try again shortly.” and nothing is changed
Fairness between connections	Turns go to the connection served least recently	One connection searching dozens of mailboxes cannot hold up another’s single call

An all-mailboxes search counts as one call, and within a connection calls that name one mailbox go before all-mailboxes work.

Signing In

Limit	Value	What happens at the limit
Wrong passwords per client address, and per mailbox	5 in 15 minutes	Sign-in pauses for up to 15 minutes. The client address is the one your AI app or browser connects from, so an office that shares one internet connection shares the pause
Wrong passwords per mailbox per day from one network	20	That mailbox refuses sign-in from that network for the day
Mailboxes in one connection	No limit
Checking a pasted list	60 seconds plus 2 seconds per mailbox	Checking stops; nothing is connected until every line passes, so a shorter list may be needed, with the rest added on the manage page
Mailboxes that may sign in	Any on a Noiz mail server, found by the domain’s MX record, or on a client mail server Noiz manages	Any other address is told “Mail for example.com is not hosted by Noiz” and no password is tried

Tokens and Connection Lifetime

Item	Value
Access token	1 hour, renewed by the AI app without you noticing
Refresh token	30 days from its last use, and it rotates on every use, so a connection in regular use stays signed in
Connection	Ends 90 days after sign-in however often it was refreshed; you then sign in again
Unused connection	Ends when its refresh token expires, 30 days after the last use
Password change on the mail server	Ends the connection on the next call that opens that mailbox on its own; in an all-mailboxes search the mailbox is skipped and the rest continue
Disconnect	Immediate, from the AI app or the manage page

When a connection ends, your AI app shows a Reconnect button or asks you to sign in again. Your mail is untouched.

What Is Kept After a Connection Ends

A revoked connection’s record, with its sealed password, is deleted 30 days after revocation. A connection that was never used and cannot be unlocked any more is deleted at the same housekeeping run. Audit lines are kept for 30 days; see Security and Privacy for what they contain.