Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
On 3 Mar 2026, at 19:34, Eric Sharakan via mailmate wrote: I've been using this workaround for years. In addition to setting some other mailbox as the Sent Messages folder, I went in to the account settings and unsubscribed from Exchange's Sent Items folder. I've got this as well with an MS365 account but never really thought much about it. At least on my account it looks like Microsoft adds a `\Recent` flag to the raw flags and this can be used for filtering. Charlie -- Charlie Clark Sengelsweg 34 Düsseldorf D- 40489 Tel: +49-203-746000 Mobile: +49-178-782-6226 ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
On 3 Mar 2026, at 12:36, Bill Cole wrote: On 2026-03-03 at 11:29:33 UTC-0500 (Tue, 3 Mar 2026 16:29:33 +) Henry Seiden is rumored to have said: If it has been the case this long, pretty sure Benny, the developer has known about it as has M$ (Microsoft). Benny knows A LOT. Unfortunately, not enough people pay for MM to support him hiring help, or at least that is the impression I've gotten. Microsoft knows NOTHING about 3rd-party mail clients. They don't care, except when given an opportunity to degrade the experience of using non-MS software. As to why they each made that conscious decision is up to the respective developers, I’m betting it was a conscious one on each of them. Mailmate shouldn’t be responsible for unique non-standard server’s, that’s a slippery slope in my opinion. Agreed. It's an easy workaround for those cursed with Exchange to either ignore the dupes or use a MM rule to hide them. I *thought* that Benny had provided a new 'defaults' pref to disable saving a copy of sent messages to the Sent mailbox, but I can find no such conversation now... Benny did provide a workaround of sorts; look here: https://freron.lighthouseapp.com/projects/58672/tickets/2145-do-not-store-copies-in-sent-messages#ticket-2145-32 I've been using this workaround for years. In addition to setting some other mailbox as the Sent Messages folder, I went in to the account settings and unsubscribed from Exchange's Sent Items folder. -Eric___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
On 2026-03-03 at 11:29:33 UTC-0500 (Tue, 3 Mar 2026 16:29:33 +)
Henry Seiden
is rumored to have said:
If it has been the case this long, pretty sure Benny, the developer
has known about it as has M$ (Microsoft).
Benny knows A LOT. Unfortunately, not enough people pay for MM to
support him hiring help, or at least that is the impression I've gotten.
Microsoft knows NOTHING about 3rd-party mail clients. They don't care,
except when given an opportunity to degrade the experience of using
non-MS software.
As to why they each made that conscious decision is up to the
respective developers, I’m betting it was a conscious one on each of
them. Mailmate shouldn’t be responsible for unique non-standard
server’s, that’s a slippery slope in my opinion.
Agreed. It's an easy workaround for those cursed with Exchange to either
ignore the dupes or use a MM rule to hide them.
I *thought* that Benny had provided a new 'defaults' pref to disable
saving a copy of sent messages to the Sent mailbox, but I can find no
such conversation now...
It is easily avoidable on the users’ end, regardless.
I'm sure a rule could do the trick.
It may be possible in MailMate to create a second mailbox for sent
messages, tell MM that it is the special "Sent Messages" mailbox
("mailbox type" contextual pull-down) and then just unsubscribe from the
place Exchange is putting copies. I HAVE NOT TESTED THAT!
On 3 Mar 2026, at 11:21, aisrael wrote:
I am not sure if it helps, but I found this message from 2022
(however it seems the raw headers of the pairs of mails were
different in the reported case, which may not be your case) :
This is a known issue: Mailmate moves the message from Drafts to Sent
after you send it (that's the one with few headers), and then
Exchange "helpfully" puts a copy of all outgoing mail into Sent as
well. I have simply made a smart "In/Out" mailbox to show me messages
where "From is not me" or "Received does not exist", which hides all
of the Exchange copies.
Alain
On 3 Mar 2026, at 16:48, Jeff Bullard via mailmate wrote:
I appreciate the response and that this is a cosmetic issue and not
an operational problem. Even so, I think the developer should be
able and willing to investigate and fix this, especially since the
duplicates do not appear within any other email client I have on my
computer (Apple Mail, Outlook, and Airmail). It those apps all
figured it out, why not MailMate? Just saying it “is a known issue
and can be ignored” is not a very helpful response for those of us
who are experiencing it, especially since (a) Exchange is an
extremely common mail server and (b) some of us did pay at least a
small amount for MailMate.
Jeffrey W Bullard PhD | FACerS | FWAS
Department of Materials Science and Engineering
Zachry Department of Civil and Environmental Engineering
Texas A&M University
3136 TAMU
College Station, Texas 77843
On 3 Mar 2026, at 9:37, Robert Brenstein wrote:
This is a known issue and it has been discussed on this list a
number of times. As far as I remember, the duplication is caused by
Exchange server due to the way it handles sending mail. You can
just ignore this duplication. Mail was sent only once. If you
search past posts in the list, you may find how others go about
this.
On 3 Mar 2026, at 14:45, Luís Trevisan wrote:
Hi all,
I'm experiencing duplicate messages in my Sent Items folder in
Microsoft 365 / Exchange account.
Setup details:
- Account type: Exchange / Outlook.com (Microsoft 365 corporate)
- The duplicates appear exclusively in the Sent Items folder
- The duplicate messages are identical
- No other folders are affected
Has anyone experienced this with an Exchange account and found a
reliable fix?
Thank you in advance.
Luís
___
mailmate mailing list
Unsubscribe:
https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!KwNVnqRv!GH26zL_0CuSnuOaOC2n0QgkFpftFLv4rOohR0hN1kGJJQAHNakfBeUikt_AdGHsAjmd5e_kawemLqNopSR2ZVOgpBTK-cQ$
___
mailmate mailing list
Unsubscribe:
https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!JFdNOqOXpB6UZW0!tPNW4r5_F51XpSj-obZ9EWh9WS8nasOGAGM61PI0e8xWzGyPnVCnW1X-nByD7I8WJ0XvFeMVyj1AdM0petgzxA$
___
mailmate mailing list
Unsubscribe: https://lists.freron.com/listinfo/mailmate
___
mailmate mailing list
Unsubscribe: https://lists.freron.com/listinfo/mailmate
--
Bill Cole
[email protected] or [email protected]
(AKA @[email protected] and many *@billmail.scconsult.com
addresses)
Please keep discussion mailing list replies *on-list*
Not Currently Available For Hire
___
mailmate mailing list
Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
FWIW, I archive my mail off-server. There, I have found instances where Sent Mail is duplicated from this list to my Inbox, thereby duplicating what was sent by me here. It does clutter up the Archive. This seems done by default on the list server, sending back to those who choose that acknowledgement in the server settings. I believe it can be otherwise configured. It has not yet been a concern because I can easily delete those duplicate in my Archive app (EagleFiler) as well as other instances where it may occur (such as Outlook). Now it seems I can do the same with a Smart Mailbox. Hmm… Respectfully, Henry Seiden - - Techworks Pro Co. E: infotechworksprocom W: http://techworkspro.com On 3 Mar 2026, at 11:21, aisrael wrote: > I am not sure if it helps, but I found this message from 2022 (however it > seems the raw headers of the pairs of mails were different in the reported > case, which may not be your case) : > > This is a known issue: Mailmate moves the message from Drafts to Sent after > you send it (that's the one with few headers), and then Exchange "helpfully" > puts a copy of all outgoing mail into Sent as well. I have simply made a > smart "In/Out" mailbox to show me messages where "From is not me" or > "Received does not exist", which hides all of the Exchange copies. > > Alain > > On 3 Mar 2026, at 16:48, Jeff Bullard via mailmate wrote: > >> I appreciate the response and that this is a cosmetic issue and not an >> operational problem. Even so, I think the developer should be able and >> willing to investigate and fix this, especially since the duplicates do not >> appear within any other email client I have on my computer (Apple Mail, >> Outlook, and Airmail). It those apps all figured it out, why not MailMate? >> Just saying it “is a known issue and can be ignored” is not a very helpful >> response for those of us who are experiencing it, especially since (a) >> Exchange is an extremely common mail server and (b) some of us did pay at >> least a small amount for MailMate. >> >> Jeffrey W Bullard PhD | FACerS | FWAS >> Department of Materials Science and Engineering >> Zachry Department of Civil and Environmental Engineering >> Texas A&M University >> 3136 TAMU >> College Station, Texas 77843 >> >> On 3 Mar 2026, at 9:37, Robert Brenstein wrote: >> >>> This is a known issue and it has been discussed on this list a number of >>> times. As far as I remember, the duplication is caused by Exchange server >>> due to the way it handles sending mail. You can just ignore this >>> duplication. Mail was sent only once. If you search past posts in the list, >>> you may find how others go about this. >>> >>> On 3 Mar 2026, at 14:45, Luís Trevisan wrote: >>> Hi all, I'm experiencing duplicate messages in my Sent Items folder in Microsoft 365 / Exchange account. Setup details: - Account type: Exchange / Outlook.com (Microsoft 365 corporate) - The duplicates appear exclusively in the Sent Items folder - The duplicate messages are identical - No other folders are affected Has anyone experienced this with an Exchange account and found a reliable fix? Thank you in advance. Luís >> >>> ___ >>> mailmate mailing list >>> Unsubscribe: >>> https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!KwNVnqRv!GH26zL_0CuSnuOaOC2n0QgkFpftFLv4rOohR0hN1kGJJQAHNakfBeUikt_AdGHsAjmd5e_kawemLqNopSR2ZVOgpBTK-cQ$ > >> ___ >> mailmate mailing list >> Unsubscribe: >> https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!JFdNOqOXpB6UZW0!tPNW4r5_F51XpSj-obZ9EWh9WS8nasOGAGM61PI0e8xWzGyPnVCnW1X-nByD7I8WJ0XvFeMVyj1AdM0petgzxA$ > ___ > mailmate mailing list > Unsubscribe: https://lists.freron.com/listinfo/mailmate signature.asc Description: OpenPGP digital signature ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
If it has been the case this long, pretty sure Benny, the developer has known about it as has M$ (Microsoft). As to why they each made that conscious decision is up to the respective developers, I’m betting it was a conscious one on each of them. Mailmate shouldn’t be responsible for unique non-standard server’s, that’s a slippery slope in my opinion. It is easily avoidable on the users’ end, regardless. Respectfully, Henry Seiden - - Techworks Pro Co. E: infotechworksprocom W: http://techworkspro.com On 3 Mar 2026, at 11:21, aisrael wrote: > I am not sure if it helps, but I found this message from 2022 (however it > seems the raw headers of the pairs of mails were different in the reported > case, which may not be your case) : > > This is a known issue: Mailmate moves the message from Drafts to Sent after > you send it (that's the one with few headers), and then Exchange "helpfully" > puts a copy of all outgoing mail into Sent as well. I have simply made a > smart "In/Out" mailbox to show me messages where "From is not me" or > "Received does not exist", which hides all of the Exchange copies. > > Alain > > On 3 Mar 2026, at 16:48, Jeff Bullard via mailmate wrote: > >> I appreciate the response and that this is a cosmetic issue and not an >> operational problem. Even so, I think the developer should be able and >> willing to investigate and fix this, especially since the duplicates do not >> appear within any other email client I have on my computer (Apple Mail, >> Outlook, and Airmail). It those apps all figured it out, why not MailMate? >> Just saying it “is a known issue and can be ignored” is not a very helpful >> response for those of us who are experiencing it, especially since (a) >> Exchange is an extremely common mail server and (b) some of us did pay at >> least a small amount for MailMate. >> >> Jeffrey W Bullard PhD | FACerS | FWAS >> Department of Materials Science and Engineering >> Zachry Department of Civil and Environmental Engineering >> Texas A&M University >> 3136 TAMU >> College Station, Texas 77843 >> >> On 3 Mar 2026, at 9:37, Robert Brenstein wrote: >> >>> This is a known issue and it has been discussed on this list a number of >>> times. As far as I remember, the duplication is caused by Exchange server >>> due to the way it handles sending mail. You can just ignore this >>> duplication. Mail was sent only once. If you search past posts in the list, >>> you may find how others go about this. >>> >>> On 3 Mar 2026, at 14:45, Luís Trevisan wrote: >>> Hi all, I'm experiencing duplicate messages in my Sent Items folder in Microsoft 365 / Exchange account. Setup details: - Account type: Exchange / Outlook.com (Microsoft 365 corporate) - The duplicates appear exclusively in the Sent Items folder - The duplicate messages are identical - No other folders are affected Has anyone experienced this with an Exchange account and found a reliable fix? Thank you in advance. Luís >> >>> ___ >>> mailmate mailing list >>> Unsubscribe: >>> https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!KwNVnqRv!GH26zL_0CuSnuOaOC2n0QgkFpftFLv4rOohR0hN1kGJJQAHNakfBeUikt_AdGHsAjmd5e_kawemLqNopSR2ZVOgpBTK-cQ$ > >> ___ >> mailmate mailing list >> Unsubscribe: >> https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!JFdNOqOXpB6UZW0!tPNW4r5_F51XpSj-obZ9EWh9WS8nasOGAGM61PI0e8xWzGyPnVCnW1X-nByD7I8WJ0XvFeMVyj1AdM0petgzxA$ > ___ > mailmate mailing list > Unsubscribe: https://lists.freron.com/listinfo/mailmate signature.asc Description: OpenPGP digital signature ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
I am not sure if it helps, but I found this message from 2022 (however it seems the raw headers of the pairs of mails were different in the reported case, which may not be your case) : This is a known issue: Mailmate moves the message from Drafts to Sent after you send it (that's the one with few headers), and then Exchange "helpfully" puts a copy of all outgoing mail into Sent as well. I have simply made a smart "In/Out" mailbox to show me messages where "From is not me" or "Received does not exist", which hides all of the Exchange copies. Alain On 3 Mar 2026, at 16:48, Jeff Bullard via mailmate wrote: I appreciate the response and that this is a cosmetic issue and not an operational problem. Even so, I think the developer should be able and willing to investigate and fix this, especially since the duplicates do not appear within any other email client I have on my computer (Apple Mail, Outlook, and Airmail). It those apps all figured it out, why not MailMate? Just saying it “is a known issue and can be ignored” is not a very helpful response for those of us who are experiencing it, especially since (a) Exchange is an extremely common mail server and (b) some of us did pay at least a small amount for MailMate. Jeffrey W Bullard PhD | FACerS | FWAS Department of Materials Science and Engineering Zachry Department of Civil and Environmental Engineering Texas A&M University 3136 TAMU College Station, Texas 77843 On 3 Mar 2026, at 9:37, Robert Brenstein wrote: This is a known issue and it has been discussed on this list a number of times. As far as I remember, the duplication is caused by Exchange server due to the way it handles sending mail. You can just ignore this duplication. Mail was sent only once. If you search past posts in the list, you may find how others go about this. On 3 Mar 2026, at 14:45, Luís Trevisan wrote: Hi all, I'm experiencing duplicate messages in my Sent Items folder in Microsoft 365 / Exchange account. Setup details: - Account type: Exchange / Outlook.com (Microsoft 365 corporate) - The duplicates appear exclusively in the Sent Items folder - The duplicate messages are identical - No other folders are affected Has anyone experienced this with an Exchange account and found a reliable fix? Thank you in advance. Luís ___ mailmate mailing list Unsubscribe: https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!KwNVnqRv!GH26zL_0CuSnuOaOC2n0QgkFpftFLv4rOohR0hN1kGJJQAHNakfBeUikt_AdGHsAjmd5e_kawemLqNopSR2ZVOgpBTK-cQ$ ___ mailmate mailing list Unsubscribe: https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!JFdNOqOXpB6UZW0!tPNW4r5_F51XpSj-obZ9EWh9WS8nasOGAGM61PI0e8xWzGyPnVCnW1X-nByD7I8WJ0XvFeMVyj1AdM0petgzxA$ ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
I appreciate the response and that this is a cosmetic issue and not an operational problem. Even so, I think the developer should be able and willing to investigate and fix this, especially since the duplicates do not appear within any other email client I have on my computer (Apple Mail, Outlook, and Airmail). It those apps all figured it out, why not MailMate? Just saying it “is a known issue and can be ignored” is not a very helpful response for those of us who are experiencing it, especially since (a) Exchange is an extremely common mail server and (b) some of us did pay at least a small amount for MailMate. Jeffrey W Bullard PhD | FACerS | FWAS Department of Materials Science and Engineering Zachry Department of Civil and Environmental Engineering Texas A&M University 3136 TAMU College Station, Texas 77843 On 3 Mar 2026, at 9:37, Robert Brenstein wrote: This is a known issue and it has been discussed on this list a number of times. As far as I remember, the duplication is caused by Exchange server due to the way it handles sending mail. You can just ignore this duplication. Mail was sent only once. If you search past posts in the list, you may find how others go about this. On 3 Mar 2026, at 14:45, Luís Trevisan wrote: Hi all, I'm experiencing duplicate messages in my Sent Items folder in Microsoft 365 / Exchange account. Setup details: - Account type: Exchange / Outlook.com (Microsoft 365 corporate) - The duplicates appear exclusively in the Sent Items folder - The duplicate messages are identical - No other folders are affected Has anyone experienced this with an Exchange account and found a reliable fix? Thank you in advance. Luís ___ mailmate mailing list Unsubscribe: https://urldefense.com/v3/__https://lists.freron.com/listinfo/mailmate__;!!KwNVnqRv!GH26zL_0CuSnuOaOC2n0QgkFpftFLv4rOohR0hN1kGJJQAHNakfBeUikt_AdGHsAjmd5e_kawemLqNopSR2ZVOgpBTK-cQ$ ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
This is a known issue and it has been discussed on this list a number of times. As far as I remember, the duplication is caused by Exchange server due to the way it handles sending mail. You can just ignore this duplication. Mail was sent only once. If you search past posts in the list, you may find how others go about this. On 3 Mar 2026, at 14:45, Luís Trevisan wrote: Hi all, I'm experiencing duplicate messages in my Sent Items folder in Microsoft 365 / Exchange account. Setup details: - Account type: Exchange / Outlook.com (Microsoft 365 corporate) - The duplicates appear exclusively in the Sent Items folder - The duplicate messages are identical - No other folders are affected Has anyone experienced this with an Exchange account and found a reliable fix? Thank you in advance. Luís ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
FWIW, I’m using an Exchange server and I have this same duplication issue on a regular basis in my Sent folder. Sometimes even more than two duplicates. I’ve just gotten used to it. The same duplicates are not there when I open Outlook or Apple Mail. Jeffrey W Bullard PhD | FACerS | FWAS Department of Materials Science and Engineering Zachry Department of Civil and Environmental Engineering Texas A&M University 3136 TAMU College Station, Texas 77843 On 3 Mar 2026, at 8:23, Henry Seiden wrote: Luis, I have not experienced the issue on my Outlook account, but it is infrequently used. Could this be caused by the settings on your server? IOW, can you see the same problem using another client (Apple Mail or Outlook Mail or web app)? Respectfully, Henry Seiden - - Techworks Pro Co. E: infotechworksprocom W: http://techworkspro.com On 3 Mar 2026, at 8:45, Luís Trevisan wrote: Hi all, I'm experiencing duplicate messages in my Sent Items folder in Microsoft 365 / Exchange account. Setup details: - Account type: Exchange / Outlook.com (Microsoft 365 corporate) - The duplicates appear exclusively in the Sent Items folder - The duplicate messages are identical - No other folders are affected Has anyone experienced this with an Exchange account and found a reliable fix? Thank you in advance. Luís___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
Re: [MlMt] Duplicate messages in Sent Items (Exchange account)
Luis, I have not experienced the issue on my Outlook account, but it is infrequently used. Could this be caused by the settings on your server? IOW, can you see the same problem using another client (Apple Mail or Outlook Mail or web app)? Respectfully, Henry Seiden - - Techworks Pro Co. E: infotechworksprocom W: http://techworkspro.com On 3 Mar 2026, at 8:45, Luís Trevisan wrote: > Hi all, > > I'm experiencing duplicate messages in my Sent Items folder in Microsoft 365 > / Exchange account. > > Setup details: > - Account type: Exchange / Outlook.com (Microsoft 365 corporate) > - The duplicates appear exclusively in the Sent Items folder > - The duplicate messages are identical > - No other folders are affected > > Has anyone experienced this with an Exchange account and found a reliable fix? > > Thank you in advance. > Luís___ > mailmate mailing list > Unsubscribe: https://lists.freron.com/listinfo/mailmate signature.asc Description: OpenPGP digital signature ___ mailmate mailing list Unsubscribe: https://lists.freron.com/listinfo/mailmate
