Limits

Limits built into Viauna. The ones you can change are settings: see Configuration.

Reading and writing mail

Limit	Value
Largest attachment	MAX_UPLOAD_MB, 25 MB by default (a setting)
Attachments on one message	100
Recipients	500 each in To, Cc and Bcc
Subject	998 characters
Message text	5,000,000 characters of HTML
Attachments kept while you write	2 days from adding them; then attach them again
A message opened	At most 200 MB of it is downloaded
Undo	10 minutes, and not after a restart
Conversations per page	25, 50 or 100
A new folder's name	200 characters
A label's name	1 to 100 characters

Search

Limit	Value
Matches per folder	The newest 3,000
The same search again	Answered from memory for 60 s

Sending as other addresses

Limit	Value
Other addresses per mailbox	20
Addresses added, servers asked or passwords tried	10 per mailbox every 15 minutes
A code	Works for 24 hours, and for 5 tries
Codes sent	One a minute and 5 a day to an address; 20 a day from a mailbox

Filters and the vacation responder

Limit	Value
Filters per mailbox	200
From, To, Subject, Has the words, Doesn't have	500 characters each
Forwarding address	320 characters
Other apps' scripts included	5
Vacation subject	200 characters
Vacation message	10,000 characters
Replies to one sender	One every 4 days

Contacts

Limit	Value
One import	20 MB and 10,000 contacts
One contact	1 MB as a vCard
Labels on a contact	30, each 1 to 60 characters
Dates on a contact	A birthday and 20 others
A date's label	60 characters
Nickname	200 characters
Deleted at once	10,000
Listed at a time	200, then 200 more with Show more
Suggestions while you write	8

Calendar

Limit	Value
Calendars per mailbox	50
A calendar's name	1 to 100 characters, on one line
An event's title	500 characters
Location	1,000 characters
Description	20,000 characters
Video call link	2,000 characters, starting https:// or http://
Repeat every	1 to 999 days, weeks, months or years
Repeat so many times	1 to 9,999
Occurrences worked out	50,000 from the first
A rule made in another app	2,000 characters
One import	20 MB and 10,000 events
One event	1 MB as iCalendar
Events asked for at once	400 days
Search results	The newest 200
Undo	10 minutes, and not after a restart
Reminders on an event	5, from four weeks before it (four weeks and a day for an all-day event) to the end of an all-day event's day
A reminder that's late (Viauna was down)	Sent if at most 15 minutes late, else skipped
Reminders looked for	Every 30 s
An invitation's calendar part	1 MB
Guests on an event	100
Browsers with reminders on, per mailbox	20; the oldest goes
A pushed reminder	3,000 bytes before encrypting; 15 s to post; kept by the push service until the event starts and 5 minutes more (5 minutes to a day)
A browser that fails	Dropped after 10 failed pushes in a row, or at once if its push service says it's gone

Calendars from the web

Limit	Value
An address	2,000 characters
One fetch	30 s, redirects included
Redirects	5
The file	10 MB, after decompressing
Its events	10,000, each 1 MB as iCalendar
Fetched again	Every 6 hours, or an hour after a fetch that failed
Refresh now	Once a minute for each calendar
Calendars	Counted with the mailbox's own: 50 in all

Accounts and settings

Limit	Value
Accounts per browser	MAX_ACCOUNTS, 10 by default (a setting, 1 to 100)
Session length	SESSION_DAYS, 30 by default (a setting, 1 to 3,650)
Sign-in attempts	20 per client address and 8 per login, every 15 minutes
Password changes	5 per mailbox every 15 minutes
New password	8 to 1,024 characters
Your name	200 characters
Signature	20,000 characters
Send-as addresses	50
APP_NAME	60 characters, on one line
A list setting (ADMIN_ADDRESSES, ALLOWED_DOMAINS)	1,000 entries
Changes shown	The newest 25 on the admin page, 50 with viauna changes

Waiting on other systems

Limit	Value
Connecting to IMAP	30 s, and 16 s for the server's greeting
ManageSieve	15 s without an answer
A CardDAV request	20 s
A password command	30 s, then it's stopped
A password webhook or LDAP directory	15 s
A reason shown from a command, webhook or directory	200 characters