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Executing mailto Web link with more than 240 characters either truncates or does not execute

Technote (FAQ)


When Lotus Notes® is the default mail program, you find that executing a Web link that uses HTML code to set the mailto parameter, either truncates the content or does not result in any action. When the mailto sets a To (Sendto) address greater than 240 characters, there is no action. If the mailto specifies the BCC content then the limit is lower, typically 235 characters.

In earlier Notes releases the link may execute but the address content will be truncated. In later releases, with borderline cases, the address will remove the last character of the address.

The link can also cease to function if the total length of other fields (e.g., Subject, Body) are greater than their limit, which is somewhere between 244-250 characters.

Dear John

The following error has been reported to occur in some cases:

"Error processing command line arguments"


This issue was reported to Quality Engineering as SPR# MCHZ6C2HNQ, which has been addressed in Notes/Domino 7.0.3 and 8.0. The feature can now handle at least 1500 characters.

Excerpt from the Lotus Notes and Domino Release 7.0.3 MR fix list (available at

SPR# MCHZ6C2HNQ - Increase the length of the string that can be passed into Notes from the command line above 255 bytes. This is a backport of the fix that was submitted into 8. This allows the Notes client to process a mailto URL of greater size (~8 KB). To enable this an OS environment variable Notes_UseExtCmdline=1 must be set. Please note that this is not a notes.ini setting but rather an environment variable.

Refer to the Upgrade Central site for details on upgrading Notes/Domino.

Note: This issue was originally reported in earlier releases as SPR# LABN4N2QJ3.

Related information

Programmatically added names are truncated if more than

Cross reference information
Segment Product Component Platform Version Edition
Messaging Applications Lotus End of Support Products Lotus Domino 7.0, 6.5, 6.0, 5.0

Historical Number


Product Alias/Synonym

Lotus Notes Client

Document information

More support for: Lotus End of Support Products
Lotus Notes

Software version: 5.0, 6.0, 6.5, 7.0

Operating system(s): Windows, iOS

Reference #: 1094966

Modified date: 17 October 2007